Science Fall Semester Exam
Science Fall Semester Exam
Questions and Answers
- 1.
What is the biosphere?
- A.
All the members of one species in a particular area.
- B.
A community of organisms living in a specific environment.
- C.
The parts of the land, sea and atmosphere in which organisms are able to live.
Correct Answer
C. The parts of the land, sea and atmosphere in which organisms are able to live.Explanation
The biosphere refers to the parts of the land, sea, and atmosphere in which organisms are able to live. It encompasses all the ecosystems on Earth, including terrestrial, aquatic, and atmospheric environments, where living organisms can survive and interact with their surroundings. This definition highlights the broad scope of the biosphere, emphasizing its inclusion of various habitats and ecosystems that support life.Rate this question:
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- 2.
What kind of cells do humans have?
- A.
Prokaryotic
- B.
Eukaryotic
Correct Answer
B. EukaryoticExplanation
Humans have eukaryotic cells. Eukaryotic cells are characterized by having a true nucleus that contains the genetic material, as well as membrane-bound organelles such as mitochondria, endoplasmic reticulum, and Golgi apparatus. These cells are more complex than prokaryotic cells, which lack a nucleus and membrane-bound organelles. In humans, eukaryotic cells make up all the tissues and organs in the body, including the skin, muscles, and organs like the heart, lungs, and brain.Rate this question:
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- 3.
What kind of cells do plants have?
- A.
Eukaryotic
- B.
Prokaryotic
Correct Answer
A. EukaryoticExplanation
Plants have eukaryotic cells because they are multicellular organisms that have a nucleus enclosed within a membrane. Eukaryotic cells are characterized by having membrane-bound organelles, including a nucleus, mitochondria, and chloroplasts. These organelles allow plants to carry out essential functions such as photosynthesis, respiration, and genetic regulation. Prokaryotic cells, on the other hand, lack a nucleus and membrane-bound organelles. Therefore, plants having eukaryotic cells is the correct answer.Rate this question:
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- 4.
What kind of cells do bacteria have?
- A.
Prokaryotic
- B.
Eukaryotic
Correct Answer
A. ProkaryoticExplanation
Bacteria are prokaryotic cells. Prokaryotic cells are simple, single-celled organisms that lack a nucleus and other membrane-bound organelles. They have a cell wall, cell membrane, and genetic material in the form of a single circular chromosome. Bacteria reproduce through binary fission and can be found in various shapes and sizes. Unlike eukaryotic cells, prokaryotic cells do not have a true nucleus or complex internal structures. Therefore, the correct answer is "Prokaryotic."Rate this question:
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- 5.
What kingdoms are made up of prokaryotic cells?
- A.
Bacteria & Archea
- B.
Protists & Plants
- C.
Bacteria & Fungi
- D.
Animals & Plants
- E.
Archea & Plants
Correct Answer
A. Bacteria & ArcheaExplanation
Bacteria and Archaea are the two kingdoms made up of prokaryotic cells. Prokaryotic cells lack a nucleus and other membrane-bound organelles. Bacteria are single-celled organisms that can be found in various environments, including soil, water, and the human body. Archaea are also single-celled organisms, but they are known for their ability to thrive in extreme environments such as hot springs and deep-sea hydrothermal vents. Both bacteria and archaea play crucial roles in various ecological processes and have unique characteristics that distinguish them from other organisms.Rate this question:
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- 6.
Which food chain correctly describes the flow of energy in an ecosystem?
- A.
Grass-->cow-->human
- B.
Caterpillar-->leaf-->human
- C.
Cow-->grass-->human
- D.
Leaf-->bird-->caterpillar
Correct Answer
A. Grass-->cow-->humanExplanation
The correct answer is grass-->cow-->human. This food chain accurately represents the flow of energy in an ecosystem. Grass is a producer that converts sunlight into energy through photosynthesis. The cow is a primary consumer that feeds on grass, obtaining energy from it. Finally, humans are secondary consumers that consume cows, obtaining energy from them. This food chain demonstrates how energy is transferred from one organism to another in a linear manner.Rate this question:
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- 7.
Rabbits eat grass and other plants to survive, but they do not eat animals. What kind of animal are rabbits?
- A.
Decomposers
- B.
Carnivores
- C.
Producers
- D.
Herbivores
Correct Answer
D. HerbivoresExplanation
Rabbits are considered herbivores because they primarily consume grass and other plants to meet their dietary needs. They do not consume animals, which distinguishes them from carnivores. Herbivores are organisms that rely on a plant-based diet for sustenance. Therefore, the correct answer is herbivores.Rate this question:
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- 8.
In what order do a hawk, grass, and rabbit form a food chain in a meadow?
- A.
Hawk-->grass-->rabbit
- B.
Grass-->hawk-->rabbit
- C.
Rabbit-->grass-->hawk
- D.
Grass-->rabbit-->hawk
Correct Answer
D. Grass-->rabbit-->hawkExplanation
A food chain represents the flow of energy in an ecosystem. In this particular food chain, grass is the primary producer, which means it is the source of energy for the rest of the organisms. The rabbit is a herbivore, which feeds on the grass, making it the primary consumer. Finally, the hawk is a predator that feeds on the rabbit, making it the secondary consumer. Therefore, the correct order for the food chain is grass-->rabbit-->hawk.Rate this question:
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- 9.
A _____ contains most of the cells genetic material
- A.
Membrane
- B.
Nucleus
- C.
Nuclear
Correct Answer
B. NucleusExplanation
The correct answer is "Nucleus." The nucleus is a membrane-bound organelle found in eukaryotic cells that contains most of the cell's genetic material, including DNA. It acts as the control center of the cell, regulating gene expression and coordinating cellular activities. The genetic material stored in the nucleus is essential for cell growth, reproduction, and functioning.Rate this question:
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- 10.
____ conduct photosynthesis in a plant cell
- A.
Chloroplast
- B.
Golgi apparatus
- C.
Vacuole
Correct Answer
A. ChloroplastExplanation
Chloroplasts are responsible for conducting photosynthesis in plant cells. They contain chlorophyll, a pigment that captures sunlight and converts it into energy through a series of chemical reactions. This energy is then used to produce glucose, which is the main source of energy for the plant. The Golgi apparatus is involved in processing and packaging proteins, while the vacuole is responsible for storing water, nutrients, and waste materials. However, neither of these organelles is directly involved in photosynthesis. Therefore, the correct answer is chloroplast.Rate this question:
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- 11.
_______ membrane is the membrane that surrounds the nucleus
- A.
Little
- B.
Nuclear
- C.
Superior
Correct Answer
B. NuclearExplanation
The correct answer is "Nuclear." The nuclear membrane is the membrane that surrounds the nucleus. It acts as a protective barrier, separating the contents of the nucleus from the cytoplasm. This membrane is composed of two lipid bilayers and contains nuclear pores, which allow for the exchange of materials between the nucleus and the cytoplasm.Rate this question:
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- 12.
The _______ controls the cell and tells it what to do
- A.
Nucleus
- B.
Membrane
- C.
Brain
Correct Answer
A. NucleusExplanation
The nucleus controls the cell and tells it what to do. The nucleus is the control center of the cell, containing the cell's DNA and directing all cellular activities. It regulates the synthesis of proteins and other molecules necessary for cell function, and it also houses the nucleolus, which is responsible for the production of ribosomes. Without the nucleus, the cell would not be able to carry out its essential functions and would not be able to survive.Rate this question:
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- 13.
This is...
- A.
Plant cell
- B.
Animal cell
- C.
Insect cell
Correct Answer
B. Animal cellExplanation
The given answer is "Animal cell" because the options provided are different types of cells, and an animal cell is the most suitable option among them. Plant cells have cell walls and chloroplasts, which are not mentioned in the options. Insect cells are a specific type of animal cell, so it is not a separate category. Therefore, an animal cell is the correct answer based on the given options.Rate this question:
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- 14.
This is...
- A.
Bacteria cell
- B.
Animal cell
- C.
Plant cell
Correct Answer
C. Plant cellExplanation
The given correct answer is "Plant cell" because plant cells have unique features such as a cell wall, chloroplasts, and a large central vacuole, which are not present in animal cells or bacteria cells. The cell wall provides structural support and protection, chloroplasts are responsible for photosynthesis, and the central vacuole stores water and nutrients. These characteristics are specific to plant cells, making it the correct answer in this case.Rate this question:
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- 15.
What is the main function of the Cell Wall?
- A.
To protect and provide support for the cell
- B.
Builds proteins
- C.
Convert solar energy to chemical energy
- D.
Takes in cardon dioxide
Correct Answer
A. To protect and provide support for the cellExplanation
The cell wall's main function is to protect and provide support for the cell. It acts as a rigid outer layer that helps maintain the shape and integrity of the cell, protecting it from external forces and preventing it from bursting under osmotic pressure. Additionally, the cell wall provides structural support, allowing cells to form tissues and organs in multicellular organisms.Rate this question:
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- 16.
You will not find a cell wall in which of these kinds of organisms?
- A.
Fungi
- B.
Animal
- C.
Plants
- D.
All of the above
Correct Answer
B. AnimalExplanation
Animals do not have a cell wall. While fungi and plants have cell walls, animals have a different cellular structure called extracellular matrix. This matrix provides support and structure to animal cells, but it is not a rigid wall like the cell walls found in fungi and plants. Animals rely on other mechanisms, such as a flexible cell membrane and internal skeleton, for support and protection. Therefore, the correct answer is animal.Rate this question:
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- 17.
What part of the cell is identified with the arrow?
- A.
The nucleus
- B.
The ribosome
- C.
The vacuole
- D.
The chloroplast
Correct Answer
A. The nucleusExplanation
The arrow in the image is pointing towards the nucleus. The nucleus is a membrane-bound organelle found in eukaryotic cells. It contains the cell's genetic material, DNA, and is responsible for controlling the cell's activities, including growth, metabolism, and reproduction. The nucleus is often referred to as the "control center" of the cell.Rate this question:
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- 18.
Which organelles helps provide cell with energy and release energy?
- A.
Rough endoplasmic reticulum
- B.
Golgi apparatus and ribosomes
- C.
Mitochondria and chlorplasts
- D.
Smooth endoplasmic reticulum
Correct Answer
C. Mitochondria and chlorplastsExplanation
Mitochondria and chloroplasts are the organelles that help provide cells with energy and release energy. Mitochondria are responsible for cellular respiration, which produces ATP, the main energy currency of the cell. Chloroplasts, on the other hand, are found in plant cells and are responsible for photosynthesis, which converts sunlight into chemical energy in the form of glucose. Together, these organelles play a crucial role in energy production and storage within the cell.Rate this question:
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- 19.
Which part of the plant cell is the chloroplast?
- A.
1
- B.
2
- C.
3
- D.
4
Correct Answer
D. 4Explanation
The chloroplast is located in part 4 of the plant cell. The chloroplast is an organelle found in plant cells that is responsible for photosynthesis, the process by which plants convert sunlight into energy. It contains chlorophyll, a pigment that captures light energy, and other molecules necessary for photosynthesis to occur. The chloroplast is typically found in the cytoplasm of the plant cell and is surrounded by a double membrane.Rate this question:
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- 20.
Which of the characteristics of an archaebacteria is true?
- A.
Cell walls have peptidoglycan
- B.
Unicellular
- C.
Only autrophic
- D.
Prokaryotic
Correct Answer(s)
B. Unicellular
D. ProkaryoticExplanation
both autotrophic and heterotrophicRate this question:
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- 21.
Food chains always start with a(n) _____?
- A.
Herbivore
- B.
Producer
- C.
Carnivore
- D.
Scavenger
Correct Answer
B. ProducerExplanation
Food chains always start with a producer because producers, such as plants, are able to convert sunlight into energy through photosynthesis. They are the primary source of food and energy in a food chain, as they provide nutrients for herbivores, which are then consumed by carnivores and scavengers. Without producers, there would be no energy available for the rest of the food chain.Rate this question:
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- 22.
An organism that eats both plants and animals is called a(n) _____?
- A.
Omnivore
- B.
Carnivore
- C.
Decomposer
- D.
Herbivore
Correct Answer
A. OmnivoreExplanation
An organism that eats both plants and animals is called an omnivore. Omnivores have a diverse diet and can consume a variety of food sources, including both plant matter and other animals. This adaptation allows them to obtain nutrients from different sources, increasing their chances of survival in various environments. Examples of omnivores include humans, bears, and raccoons.Rate this question:
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- 23.
Producers are also known as _____, and consumers are known as _____?
- A.
Herbivores; carnivores
- B.
Autotrophs; carnivores
- C.
Prey; predators
- D.
Autotrophs; heterotrophs
Correct Answer
D. Autotrophs; heterotrophsExplanation
Producers, also known as autotrophs, are organisms that can produce their own food through photosynthesis or chemosynthesis. They convert sunlight or inorganic compounds into organic matter. On the other hand, consumers, also known as heterotrophs, are organisms that obtain their energy by consuming other organisms. They cannot produce their own food and rely on consuming other organisms for nutrition.Rate this question:
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- 24.
Put these animals in the correct order within a food chain.Grasshopper, Snake, Hawk, Grass, Rat
- A.
Rat, Hawk, Snake, Grasshopper, Grass
- B.
Grass, Grasshopper, Rat, Snake, Hawk
- C.
Grasshopper, Grass, Rat, Hawk, Snake
- D.
Grass, Rat, Grasshopper, Snake, Hawk
Correct Answer
B. Grass, Grasshopper, Rat, Snake, HawkExplanation
In a food chain, organisms are arranged based on who eats whom. The correct order in this food chain is Grass, Grasshopper, Rat, Snake, Hawk. Grass is at the bottom of the chain as it is eaten by the Grasshopper. The Grasshopper is then eaten by the Rat, which in turn is eaten by the Snake. Finally, the Hawk is at the top of the chain as it preys on the Snake. This order represents the flow of energy and nutrients in the ecosystem.Rate this question:
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- 25.
What is ecology?
- A.
The study of relationships between organisms and their environments.
- B.
The place where an organism lives with all the things that organism needs to be happy all the time.
- C.
A living thing
Correct Answer
A. The study of relationships between organisms and their environments.Explanation
Ecology is the study of relationships between organisms and their environments. This field of study focuses on understanding how organisms interact with each other and their surroundings, including the physical and biological factors that influence these relationships. By examining the connections between living organisms and their habitats, ecologists gain insights into how ecosystems function and how they can be conserved and managed.Rate this question:
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- 26.
An adaptation is a characteristic that helps an organism survive in its environment or helps it reproduce.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
This statement is true because adaptations are traits or characteristics that have evolved in organisms over time to help them survive and reproduce in their specific environment. These adaptations can include physical features, behaviors, or physiological processes that enhance an organism's ability to find food, avoid predators, attract mates, or withstand harsh environmental conditions. Overall, adaptations are essential for the survival and success of organisms in their respective habitats.Rate this question:
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- 27.
A desert is similar in climate/weather to a rainforest.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
A desert and a rainforest have opposite climates. A desert is characterized by low precipitation and high temperatures, while a rainforest has high precipitation and high humidity. Therefore, they are not similar in climate/weather.Rate this question:
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- 28.
A deciduous forest is a biome that: (CHECK all the boxes that are correct)
- A.
Contains trees with leaves
- B.
Has cold winters
- C.
Has warm summers
- D.
None of the above
Correct Answer(s)
A. Contains trees with leaves
B. Has cold winters
C. Has warm summersExplanation
Check ALL that apply.Rate this question:
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- 29.
A population is:
- A.
A group of many different organisms
- B.
A living thing
- C.
All the members of one species in a particular area
Correct Answer
C. All the members of one species in a particular areaExplanation
The correct answer is "all the members of one species in a particular area." This definition accurately describes a population as a group of individuals belonging to the same species that live and interact within a specific geographic area. It implies that populations consist of organisms that share common characteristics and can potentially interbreed. This definition helps distinguish populations from other groups, such as communities or ecosystems, which encompass multiple species.Rate this question:
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- 30.
Eukaryotic refers to
- A.
Cells without a nucleus
- B.
Bacteria cells
- C.
Simple cells
- D.
Cells with a nucleus
Correct Answer
D. Cells with a nucleusExplanation
Eukaryotic refers to cells with a nucleus. This means that eukaryotic cells have a distinct membrane-bound nucleus that contains the cell's genetic material. These cells are found in organisms belonging to the domain Eukarya, which includes animals, plants, fungi, and protists. Unlike prokaryotic cells, which do not have a nucleus, eukaryotic cells are more complex and have various organelles that perform specific functions within the cell. The presence of a nucleus is a defining characteristic of eukaryotic cells.Rate this question:
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- 31.
Which organelles are found in a eukaryotic cell?
- A.
Nucleus
- B.
Mitochondrion
- C.
Fungus
- D.
A and B
- E.
A, B and C
Correct Answer
D. A and BExplanation
The correct answer is A and B. In a eukaryotic cell, both the nucleus and the mitochondrion are present as organelles. The nucleus is the control center of the cell, containing the genetic material and regulating cell activities. The mitochondrion is responsible for energy production through cellular respiration. Fungus is not an organelle but a type of organism. Therefore, options A and B are the correct choices for organelles found in a eukaryotic cell.Rate this question:
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- 32.
How do decomposers help other organisms in an ecosystem?
- A.
They break down dead organisms and add nutrients back to the soil that plants use.
- B.
They use the sunlight to make their own food that other organisms eat for energy.
- C.
They help disperse seeds for plant growth.
- D.
Decomposers do not help other organisms in an ecosystem.
Correct Answer
A. They break down dead organisms and add nutrients back to the soil that plants use.Explanation
Decomposers play a crucial role in an ecosystem by breaking down dead organisms. This process releases nutrients that are trapped within the dead organisms and returns them to the soil. These nutrients are then utilized by plants for their growth and development. In this way, decomposers indirectly contribute to the well-being of other organisms in the ecosystem by ensuring a continuous cycle of nutrient availability.Rate this question:
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- 33.
Which of the following lists only consumers/heterotrophs?
- A.
Hawks, lizards, grasshoppers
- B.
Acorns, squirrels, rabbits
- C.
Grass, chipmunks, eagles
- D.
Mice, squirrels, grass
Correct Answer
A. Hawks, lizards, grasshoppersExplanation
The correct answer is hawks, lizards, grasshoppers. This list consists only of consumers or heterotrophs because hawks, lizards, and grasshoppers are all organisms that obtain their energy by consuming other organisms. They do not produce their own food through photosynthesis like plants do.Rate this question:
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- 34.
The cell membrane is...
- A.
A membrane protecting a bell
- B.
A biological membrane that separates the inside of all cells from the outside environment
- C.
A membrane that separates the cell into many pieces
Correct Answer
B. A biological membrane that separates the inside of all cells from the outside environmentExplanation
The cell membrane is a biological membrane that separates the inside of all cells from the outside environment. It acts as a barrier, controlling the movement of substances in and out of the cell. This selective permeability allows the cell to maintain internal conditions necessary for its survival, while also interacting with the external environment to exchange nutrients, waste products, and signals. The cell membrane is composed of a phospholipid bilayer with embedded proteins and other molecules that contribute to its structure and function.Rate this question:
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- 35.
Ribosomes are...
- A.
The "ribs" or structure of a cell
- B.
The organelles in cells that make protein
- C.
Protect the cell from bacteria
Correct Answer
B. The organelles in cells that make proteinExplanation
Ribosomes are small organelles found in cells that play a crucial role in protein synthesis. They are responsible for assembling amino acids into proteins based on the instructions provided by the cell's DNA. Ribosomes can be found in both prokaryotic and eukaryotic cells and are essential for the growth, development, and functioning of organisms. Therefore, the correct answer is "The organelles in cells that make protein."Rate this question:
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- 36.
___ store WATER, food and waste.
- A.
Vacuole
- B.
Jacuole
- C.
Cells
Correct Answer
A. VacuoleExplanation
The correct answer is Vacuole. Vacuoles are membrane-bound organelles found in the cells of plants, fungi, and some protists. They are responsible for storing various substances, including water, food, and waste products. Vacuoles play a crucial role in maintaining cell turgor pressure, storing nutrients, and regulating the pH balance within the cell.Rate this question:
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- 37.
What regulates/controls what enters and leaves the cell and provides protection and support?
- A.
Nucleus
- B.
Ribosomes
- C.
Cell Wall
- D.
Cell Membrane
Correct Answer
D. Cell MembraneExplanation
The cell membrane is responsible for regulating what enters and leaves the cell. It acts as a barrier, allowing only certain substances to pass through while blocking others. This selective permeability helps maintain the internal environment of the cell and protects it from harmful substances. Additionally, the cell membrane provides support and structure to the cell, helping it maintain its shape.Rate this question:
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- 38.
Which organelle would you find in a plant cell but NOT in an animal cell?
- A.
Smooth endoplasmic reticulum
- B.
Mitochondria
- C.
Ribosome
- D.
Chloroplast
Correct Answer
D. ChloroplastExplanation
Chloroplasts are the organelles responsible for photosynthesis in plant cells. They contain chlorophyll, which captures sunlight and converts it into energy for the plant. Animal cells do not have chloroplasts because they do not undergo photosynthesis. Therefore, chloroplasts are only found in plant cells and not in animal cells.Rate this question:
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- 39.
Which of the following is abiotic?
- A.
A horse
- B.
Fungus
- C.
Water
- D.
Bacteria
Correct Answer
C. WaterExplanation
Water is considered abiotic because it is a non-living component of the environment. It does not possess any biological characteristics, such as metabolism or reproduction. It is an essential abiotic factor in ecosystems, playing a crucial role in various physical and chemical processes. While horses, fungi, and bacteria are all living organisms and thus biotic, water is an inorganic substance that supports life but is not alive itself.Rate this question:
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- 40.
I am a very smart and good person, so I need to practice English during my Christmas vacation!
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
The given statement suggests that the person believes they are smart and good, and therefore, they need to practice English during their Christmas vacation. The answer "True" implies that the person agrees with this statement and acknowledges the importance of practicing English during their vacation.Rate this question:
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- 41.
The process of a virus destroying a host cell while producing new viruses is called the_________.
- A.
Lysophage cycle
- B.
Hydrolysis cycle
- C.
Cytoplasmic cycle
- D.
Lytic cycle
Correct Answer
D. Lytic cycleExplanation
The lytic cycle refers to the process in which a virus invades a host cell, takes control of its cellular machinery, replicates itself, and ultimately destroys the host cell to release new virus particles. During the lytic cycle, the virus injects its genetic material into the host cell, which then uses the host's resources to produce viral components. These components are assembled into new virus particles, causing the host cell to burst and release the viruses to infect other cells. This cycle is characteristic of virulent viruses and is essential for their replication and spread.Rate this question:
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- 42.
Viruses are not made up of cells and they cannot grow or move. All they can do is reproduce, but they cannot reproduce until they attach to another cell and use that cell as food and other things they need. The cell that is attacked and killed by a virus is called a __________ cell.
- A.
Host
- B.
Leukocyte
- C.
Decomposer
- D.
Autotroph
Correct Answer
A. HostExplanation
Viruses are not capable of independent growth or movement. Instead, they rely on infecting and utilizing the resources of other cells in order to reproduce. The cell that is attacked and ultimately killed by a virus is referred to as the host cell.Rate this question:
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- 43.
Binary fission, or splitting in 2, is the main way bacteria reproduce. The bacterium splits in 1/2 after the genetic information makes a copy of itself. Each new cell is identical to the original cell.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Binary fission is indeed the main method of reproduction for bacteria. During this process, the bacterium divides into two equal halves after its genetic information has been replicated. As a result, each new cell formed through binary fission is identical to the original cell. Therefore, the given answer, "True," accurately describes the process of bacterial reproduction through binary fission.Rate this question:
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- 44.
The picture shows a(n)
- A.
Animal cell
- B.
Eukaryotic cell
- C.
Bacterium
- D.
Virus
Correct Answer
C. BacteriumExplanation
The picture shows a bacterium. Bacteria are single-celled organisms that are prokaryotic, meaning they do not have a nucleus or membrane-bound organelles. They are typically smaller than eukaryotic cells and can have various shapes, such as rod-shaped, spherical, or spiral. Bacteria play important roles in various ecosystems, including being involved in nutrient cycling, decomposition, and some are even beneficial to humans.Rate this question:
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- 45.
The picture is probably a(n)
- A.
Bacterium
- B.
Animal cell
- C.
Virus
- D.
Eukaryotic cell
Correct Answer
A. BacteriumExplanation
The picture is most likely a bacterium because bacteria are single-celled microorganisms that can be seen under a microscope. They are prokaryotic cells, meaning they lack a nucleus and other membrane-bound organelles. Bacteria are diverse in shape and size, and they can be found in various environments.Rate this question:
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