Science 7 Quiz Part 2

2.

DNA is an acronym for

Digital nucleus
Dynoplastic nucleic protein
Deoxyribonucleic acid
Dont know answer

Correct Answer

A. Deoxyribonucleic acid

Explanation

DNA is the correct answer because it stands for deoxyribonucleic acid. DNA is a molecule that contains the genetic instructions for the development and functioning of all living organisms. It is found in the nucleus of cells and is responsible for carrying and transmitting genetic information from one generation to the next.

Rate this question:

3.

All living things are called _______

Correct Answer
organisms

Explanation
Living things are called organisms because the term "organism" refers to any individual living entity that exhibits the characteristics of life, such as growth, reproduction, and response to stimuli. This term encompasses a wide range of living beings, including plants, animals, fungi, and microorganisms. By using the term "organisms," we can categorize and refer to all living things collectively, regardless of their specific characteristics or classification.

Rate this question:

4.

The four basic necessities of life are _____, water, gases, and living space.

Correct Answer
food

Explanation
The correct answer is food because it is one of the four basic necessities of life. Food provides the nutrients and energy that our bodies need to function properly. Without food, humans and other living organisms would not be able to survive. Therefore, food is essential for sustaining life.

Rate this question:

1

5.

Most plants are

Decomposer
Producers
Consumers
Human

Correct Answer

A. Producers

Explanation

Producers are organisms that can produce their own food through photosynthesis. Most plants have the ability to convert sunlight, water, and carbon dioxide into glucose and oxygen, making them producers in the ecosystem. They play a vital role in the food chain by providing energy and nutrients to other organisms, such as decomposers and consumers.

Rate this question:

6.

The cells of most organisms are made up of approximately ____ percent water

Correct Answer
70
70%
70 percent
seventy percent

Explanation
The cells of most organisms are made up of approximately 70% water.

Rate this question:

7.

Multicellular organisms reproduce

Sexually
Asexually

Correct Answer

A. Sexually

Explanation

Multicellular organisms reproduce sexually because this method involves the fusion of gametes (sperm and egg) from two parents, resulting in offspring with genetic variation. This genetic diversity is advantageous for the survival of the species as it allows for adaptation to changing environments and increases the chances of offspring inheriting beneficial traits. Additionally, sexual reproduction promotes genetic recombination, which can lead to the elimination of harmful mutations and the creation of new combinations of genes.

Rate this question:

8.

_____ are structures that contain all of the materials necessary for life.

Correct Answer
cells

Explanation
Cells are the basic structural and functional units of all living organisms. They contain all the necessary materials, such as DNA, proteins, and organelles, that are required for the various life processes to occur. Cells are capable of carrying out functions like metabolism, growth, reproduction, and response to stimuli. They are the building blocks of life and are responsible for the organization and functioning of all living things.

Rate this question:

1

9.

Organisms use ____ to move materials in and out of cells, build cells, and make or break down food

Water
Energy
Dirt
Characteristics

Correct Answer

A. Energy

Explanation

Organisms use energy to perform various essential functions such as moving materials in and out of cells, building cells, and making or breaking down food. Energy is required for active transport processes that allow substances to move against their concentration gradient, enabling the cell to maintain homeostasis. Additionally, energy is necessary for cellular respiration, which is the process of converting food molecules into usable energy in the form of ATP. Without energy, these vital cellular processes would not be possible, hindering the organism's survival and overall functioning.

Rate this question:

10.

A mushroom is an example of a

Decomposer
Producer
Consumer
Human

Correct Answer

A. Decomposer

Explanation

A mushroom is an example of a decomposer because it plays a vital role in breaking down dead organic matter, such as fallen leaves or dead animals, into simpler substances. Decomposers like mushrooms help in the recycling of nutrients back into the ecosystem, making them an essential part of the food chain. They obtain their energy by breaking down complex organic compounds, releasing nutrients that can be used by other organisms.

Rate this question:

11.

Almost all single-celled organisms ____ as the cell gets larger, reproduce asexually, and do not have cells that perform specific functions.

Correct Answer
grow

Explanation
Single-celled organisms grow as the cell gets larger because they need to increase in size in order to accommodate the necessary cellular components and organelles. They reproduce asexually, meaning they can produce offspring without the need for a mate, which allows them to rapidly increase their population. Additionally, single-celled organisms do not have specialized cells that perform specific functions like multicellular organisms do. Instead, they rely on their single cell to perform all necessary functions for survival and reproduction.

Rate this question:

12.

Fish in very cold waters do not freeze because of a natural antifreeze- this is an example of _______

Photosynthesis
Carbon
Stimulus
Homeostasis

Correct Answer

A. Homeostasis

Explanation

Fish in very cold waters do not freeze because of a natural antifreeze- this is an example of homeostasis. Homeostasis refers to the ability of an organism to maintain a stable internal environment despite changes in the external environment. In this case, the fish have developed a mechanism to regulate their body temperature and prevent freezing in extremely cold waters, which is a form of maintaining homeostasis.

Rate this question:

13.

Cells are found in all organisms and sometimes are _______ for particular functions

Correct Answer
specialized

Explanation
Cells are the basic building blocks of all living organisms. They are capable of performing various functions, and sometimes they become specialized to carry out specific tasks. Specialized cells have unique structures and functions that enable them to perform their designated roles more efficiently. These specialized cells can be found in different organisms, including plants, animals, and microorganisms, and they play a crucial role in maintaining the overall functioning of the organism.

Rate this question:

0

14.

Humans are

Decomposers
Producers
Consumers
Plants

Correct Answer

A. Producers

Explanation

Producers are organisms that are capable of converting sunlight into energy through the process of photosynthesis. They are able to synthesize their own food, usually in the form of carbohydrates, and are the primary source of energy for all other organisms in an ecosystem. In this context, humans can be considered as producers because they have the ability to cultivate plants and crops for food production.

Rate this question:

15.

· Humans obtain water from ____and from the food they eat.

Swimming
Naturally
Through their skin
Drinking

Correct Answer(s)

A. Through their skin
A. Drinking

Explanation

Humans obtain water through their skin by absorbing moisture from the environment, such as through sweating or being in a humid environment. They also obtain water by drinking fluids, which is the most common and direct way to hydrate the body.

Rate this question:

2

16.

List the six characteristics of living things

17.

Science 7 Quiz Part 2

food is a source of _______

Quiz Preview

DNA is an acronym for

All living things are called _______

The four basic necessities of life are _____, water, gases, and living space.

Most plants are

The cells of most organisms are made up of approximately ____ percent water

Multicellular organisms reproduce

_____ are structures that contain all of the materials necessary for life.

Organisms use ____ to move materials in and out of cells, build cells, and make or break down food

A mushroom is an example of a

Almost all single-celled organisms ____ as the cell gets larger, reproduce asexually, and do not have cells that perform specific functions.

Fish in very cold waters do not freeze because of a natural antifreeze- this is an example of _______

Cells are found in all organisms and sometimes are _______ for particular functions

Humans are

· Humans obtain water from ____and from the food they eat.

List the six characteristics of living things

Provide examples of stimulus