Stems And Leaves Test
Questions and Answers
- 1.
What is the process of water passing through the plant from the root to the leaves, and out through the stomates?
- A.
Transportation
- B.
Transpiration
- C.
Water cycle
- D.
Photosynthesis
Correct Answer
B. TranspirationExplanation
Transpiration is the correct answer because it refers to the process of water passing through the plant from the root to the leaves and out through the stomates. During transpiration, water is absorbed by the roots and transported through the xylem vessels to the leaves. Once in the leaves, water evaporates through the stomates, creating a suction force that pulls more water up from the roots. This process is essential for the plant's nutrient uptake, cooling, and maintaining turgidity.Rate this question:
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- 2.
What are the tube like systems that transport water from the roots up to the leaves?
- A.
Zylem
- B.
Phloem
- C.
Xylem
- D.
Stomates
Correct Answer
C. XylemExplanation
The xylem is a tube-like system in plants that transports water from the roots up to the leaves. It consists of a series of interconnected vessels that allow for the upward movement of water through capillary action and transpiration. The xylem is responsible for supplying water and nutrients to the entire plant, ensuring its survival and growth.Rate this question:
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- 3.
What is the thing at the bottom of the stem that helps support the weight?
- A.
Tendrils
- B.
Buttress
- C.
Guard cells
- D.
Roots
Correct Answer
B. ButtressExplanation
A buttress is a structure at the bottom of a stem that helps support the weight. It provides additional stability and strength to the stem, especially in tall and heavy plants. Buttresses are often found in trees and large woody plants, where they help distribute the weight of the stem and prevent it from toppling over. They are typically thickened and enlarged areas of the stem, providing extra support and anchorage.Rate this question:
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- 4.
What is a special part of a stem that helps the stem support itself onto other structures?
- A.
Buttress
- B.
Tendrils
- C.
Guard cells
- D.
Roots
Correct Answer
B. TendrilsExplanation
Tendrils are a special part of a stem that help the stem support itself onto other structures. Tendrils are thin, wiry, and flexible structures that can wrap around objects, such as branches or trellises, providing support to the stem. They are commonly found in climbing plants and allow the stem to attach itself to other structures for stability and growth.Rate this question:
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- 5.
During the celery experiment, where did the water in the vial with the celery go?
- A.
It evaporated.
- B.
The water spilled while being stored.
- C.
The water pooled up inside of the celery.
- D.
The water passed through the celery and exited through the leaves.
Correct Answer
D. The water passed through the celery and exited through the leaves.Explanation
During the celery experiment, the water in the vial with the celery passed through the celery and exited through the leaves. This is because of a process called transpiration, where water is transported from the roots to the leaves of a plant and is then released into the atmosphere as vapor.Rate this question:
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- 6.
The purpose of putting the red dye in the water was to make sure that the none of the water spilled during the experiment.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
The purpose of putting the red dye in the water was not to ensure that none of the water spilled during the experiment. The red dye was most likely added for a different purpose, such as to make it easier to see or track the movement of the water during the experiment.Rate this question:
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- 7.
The purpose of having the red dye in the vial with the celery
- A.
Was to see how much of the water evaporated.
- B.
Was to see if the water spilled.
- C.
Was to see if the celery absorbed any of the water.
- D.
Was to make it easier to see if the celery helped the water evaporate.
Correct Answer
C. Was to see if the celery absorbed any of the water.Explanation
The purpose of having the red dye in the vial with the celery was to see if the celery absorbed any of the water. By adding the red dye to the water, any absorption by the celery would be visible as the color of the dye would change. This experiment allows for the observation of whether the celery has the ability to absorb water or not.Rate this question:
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- 8.
The vial with the water but with no celery was the ___________.
- A.
Control
- B.
Experiment
- C.
Test
- D.
Evaporation
Correct Answer
A. ControlExplanation
The vial with water but no celery is referred to as the "control" in this context. In an experiment, the control group is used as a baseline to compare the results of the experimental groups. In this case, the control vial helps to establish what would happen in the absence of celery, allowing researchers to determine the impact of the celery on the experiment's outcome.Rate this question:
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- 9.
What is the simple equation for photosynthesis?
- A.
O2 + CO2 -> H2O + Light + Sugar
- B.
CO2 + H2O -> Sugar + H2O
- C.
CO2 + O2 + Light -> Sugar + H2O
- D.
CO2 + H2O + Light -> CH2O + O2
Correct Answer
D. CO2 + H2O + Light -> CH2O + O2Explanation
The correct answer is CO2 + H2O + Light -> CH2O + O2. This equation represents the process of photosynthesis, where carbon dioxide (CO2) and water (H2O) are converted into glucose (CH2O) and oxygen (O2) using light energy.Rate this question:
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- 10.
The cell wall is made of a rigid but flexible material called _____________.
Correct Answer
cellulose
celuloseExplanation
The cell wall is made of a rigid but flexible material called cellulose. Cellulose provides structural support to plant cells and helps maintain their shape. It is a polysaccharide made up of glucose molecules linked together in a linear fashion. Cellulose is a major component of plant cell walls and is responsible for their strength and rigidity. Celulose, on the other hand, is not a correct spelling and does not exist as a term in biology.Rate this question:
- 11.
Chlorophyll is a colored, photosynthetic material called a ___________.
- A.
Chloroplast
- B.
Pigment
- C.
Green material
- D.
Photosynthesis
Correct Answer
B. PigmentExplanation
Chlorophyll is a colored, photosynthetic material that absorbs light energy and is responsible for the green color of plants. It acts as a pigment, specifically a photosynthetic pigment, which captures sunlight and converts it into chemical energy through the process of photosynthesis.Rate this question:
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- 12.
The water in the vial with the celery was the control vial.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
The statement is false because the control vial is usually the vial that does not have any changes or variables applied to it. In this case, the control vial would be the one without the celery, as it would be used to compare the effects of the celery on the water in the other vial.Rate this question:
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- 13.
In an experiment, what is the control?
- A.
The standard by which an experiment is measured.
- B.
The test that is being performed.
- C.
The part of the experiment where the variable changes.
- D.
The part of the experiment that the outcome is unknown.
Correct Answer
A. The standard by which an experiment is measured.Explanation
The control in an experiment refers to the standard by which the experiment is measured. It is the part of the experiment that remains unchanged and is used as a baseline for comparison. By keeping the control constant, any changes or effects observed can be attributed to the variable being tested. The control helps to establish cause and effect relationships and provides a reference point for evaluating the results of the experiment.Rate this question:
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- 14.
What is the tubelike structure that passes water from the leaves down through the root?
- A.
Phloem
- B.
Zylem
- C.
Xylem
- D.
Stomates
Correct Answer
A. PhloemExplanation
The tubelike structure that passes water from the leaves down through the root is called the phloem. The phloem is responsible for transporting sugars, nutrients, and other organic molecules produced in the leaves through a process called translocation. This allows for the distribution of these essential substances to other parts of the plant, including the roots. The phloem consists of living cells called sieve elements, which are connected end-to-end to form long tubes. These tubes are responsible for the bidirectional movement of materials, allowing for efficient nutrient distribution within the plant.Rate this question:
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- 15.
When a leaf is wilted, it means the guard cells are open to allow a lot of water to flow through it.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
When a leaf is wilted, it means the guard cells are closed, not open. The closing of guard cells restricts the flow of water, causing the leaf to lose turgidity and become wilted. Therefore, the statement is false.Rate this question:
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- 16.
The guard cells control the size of the stomata.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Guard cells are specialized cells found in the epidermis of plant leaves that control the opening and closing of stomata. Stomata are tiny openings on the surface of leaves that allow for gas exchange, including the intake of carbon dioxide and the release of oxygen. The guard cells surround each stoma and can change shape to regulate the size of the opening. When the guard cells are turgid or filled with water, they swell and cause the stomata to open. Conversely, when the guard cells become flaccid or lose water, they shrink and close the stomata. Therefore, the statement that guard cells control the size of the stomata is true.Rate this question:
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- 17.
What is the first part of a plant to start growing after germination?
- A.
Seed
- B.
The root
- C.
The embryo
- D.
The stem
Correct Answer
B. The rootExplanation
After germination, the first part of a plant to start growing is the root. The root emerges from the seed and begins to elongate and develop branches. It plays a crucial role in absorbing water and nutrients from the soil, providing stability to the plant, and anchoring it in the ground. The root also helps in the storage of food reserves and supports the growth of the stem and leaves. Therefore, the root is the initial structure that emerges and starts growing after germination.Rate this question:
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- 18.
The openings in the leaves are called ___________.
- A.
Stomates
- B.
Guard cells
- C.
Openings
- D.
Xylem
Correct Answer
A. StomatesExplanation
Stomates are the correct answer because they are the openings found on the surface of leaves that allow for gas exchange. These openings are surrounded by specialized cells called guard cells, which control the opening and closing of the stomates. The stomates play a crucial role in regulating the exchange of gases such as oxygen and carbon dioxide, as well as the release of water vapor through transpiration. Therefore, stomates are the correct term to describe the openings in leaves.Rate this question:
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- 19.
When we covered the branches with the plastic bag, where did all the water come from?
- A.
The rain had filled the bag.
- B.
It was just normal condensation.
- C.
The leaves had died and released the water.
- D.
The leaves had transpired and released the water.
Correct Answer
D. The leaves had transpired and released the water.Explanation
The correct answer is "The leaves had transpired and released the water." Transpiration is the process by which plants release water vapor through their leaves. This water vapor then condenses in the air and can form droplets or mist. In this case, when the branches were covered with a plastic bag, the water released by the leaves through transpiration accumulated inside the bag, creating the appearance of water coming from nowhere.Rate this question:
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- 20.
Photosynthesis takes place because of a certain pigment called ____________.
Correct Answer
chlorophyll
clorophyll
chlorophillExplanation
Photosynthesis is the process through which plants convert sunlight into energy. This process is made possible by a pigment called chlorophyll. Chlorophyll absorbs light energy from the sun and uses it to convert carbon dioxide and water into glucose and oxygen. Without chlorophyll, photosynthesis would not occur, and plants would not be able to produce the energy they need to survive.Rate this question:
- 21.
Mr. Webber is cooler than you!
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
The statement "Mr. Webber is cooler than you!" implies that Mr. Webber possesses more coolness or is more fashionable or popular than the person being addressed. Since this is a subjective statement, the correct answer depends on the perspective of the person answering the question. If the person believes that Mr. Webber is indeed cooler than them, they would choose "True" as the answer.Rate this question:
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