Plants MCQ Quiz - Multiple Choice Questions Answers
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Where does water enter the plant?
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Root
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Leaves
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Stem
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Flower
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About This Quiz
Do you want to test your knowledge of plants with this plants MCQ quiz? This is the unit test for plants. Plants are a huge part of our world, and life without plants is not possible. The quiz below has a lot of questions for you to test your knowledge as well as an understanding of plants and things revolving around them. Let's see how well you know about them. Best of luck to you!
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- 2.
What are these root structures called?
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Root Caps
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Root Hairs
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Vascular cambiums
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Stomata
Correct Answer
A. Root HairsExplanation
Root hairs are the thin, elongated extensions of root epidermal cells that increase the surface area of the root for better absorption of water and nutrients from the soil. They are responsible for the majority of water and nutrient uptake in plants. Root caps, on the other hand, are protective coverings at the tip of the root that help in pushing through the soil. Vascular cambiums are meristematic tissues responsible for secondary growth in plants, while stomata are small openings on the surface of leaves that regulate gas exchange. Therefore, the correct answer is Root Hairs.Rate this question:
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- 3.
Why do flowers have such colorful petals?
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To scare away predators.
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To attract animals for pollination.
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Trap insects
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To hide pollen
Correct Answer
A. To attract animals for pollination.Explanation
Flowers have colorful petals to attract animals for pollination. The bright colors act as a visual signal to attract pollinators such as bees, butterflies, and birds. These animals are attracted to the flowers because they associate the colors with nectar and pollen, which serve as a food source. As the animals visit the flowers to feed, they inadvertently transfer pollen from one flower to another, aiding in the process of pollination and ensuring the reproduction of the plant.Rate this question:
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- 4.
This structure is where the ovary is located.
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A
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B
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C
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D
Correct Answer
A. DExplanation
Option D is the correct answer because it is stated that "This structure is where the ovary is located." Since the question is asking for the location of the ovary, option D is the only option that indicates the correct location. Options A, B, and C do not provide any information about the location of the ovary.Rate this question:
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- 5.
What do these root structures do for the plant?
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Absorb water
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Photosynthesize
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Dehydration synthesis
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Produce important carbon dioxide
Correct Answer
A. Absorb waterExplanation
Root hair in plants is responsible for absorbing water from the soil. This is a crucial function as water is essential for plant growth and survival. The roots have specialized structures such as root hairs that increase their surface area, allowing for efficient absorption of water and nutrients. Through a process called osmosis, water moves from an area of higher concentration in the soil to an area of lower concentration in the roots. This water is then transported to other parts of the plant, providing hydration and facilitating various physiological processes.Rate this question:
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- 6.
Which letter points to the petals?
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A
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B
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C
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D
Correct Answer
A. AExplanation
The letter A points to the petals because it is located at the center of the flower and is surrounded by the curved lines that represent the petals. The other letters (B, C, and D) do not have any connection or indication to the petals.Rate this question:
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- 7.
What plant part is responsible for the majority of photosynthesis?
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Leaf
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Stem
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Flower
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Root
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Seed
Correct Answer
A. LeafExplanation
Leaves are responsible for the majority of photosynthesis in plants. They contain chlorophyll, a pigment that captures sunlight and converts it into energy through the process of photosynthesis. Leaves have a large surface area and are positioned to receive maximum sunlight exposure. They also have specialized structures called stomata that allow for gas exchange, which is necessary for photosynthesis. Additionally, leaves have a network of veins that transport water and nutrients to the cells involved in photosynthesis. Overall, the leaf's structure and function make it the primary site for photosynthesis in plants.Rate this question:
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- 8.
What process is being shown here?
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Pollination
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Germination
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Ovation
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Photosynthesis
Correct Answer
A. PollinationExplanation
The process being shown here is pollination. Pollination is the transfer of pollen from the male reproductive organ (anther) to the female reproductive organ (stigma) of a flower. This process is essential for the fertilization and reproduction of flowering plants. It can occur through various means, including wind, water, or the assistance of animals like bees or butterflies.Rate this question:
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- 9.
Which of the following is not a way seeds are dispersed?
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Sun
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Wind
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Water
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Animals
Correct Answer
A. SunExplanation
The sun is not a way seeds are dispersed. Seeds are typically dispersed through various methods such as wind, water, or animals. The sun plays a crucial role in the growth and development of plants through photosynthesis, but it does not directly disperse seeds.Rate this question:
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- 10.
Which structure is an undeveloped plant?
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A
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B
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C
Correct Answer
A. BExplanation
Option B is the correct answer because an undeveloped plant refers to a seed, which is the structure that contains the embryo of a plant. It is the initial stage of a plant's life cycle before it starts to grow and develop into a mature plant. Options A and C do not represent an undeveloped plant structure.Rate this question:
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- 11.
Which is not a function of the roots?
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Absorb water
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Anchor the plant
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Photosynthesize
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Stores food
Correct Answer
A. PhotosynthesizeExplanation
The roots of a plant have various functions, including absorbing water, anchoring the plant, and storing food. However, roots do not photosynthesize. Photosynthesis is the process by which plants convert sunlight into energy, and it primarily occurs in the leaves of the plant. Therefore, photosynthesis is not a function of the roots.Rate this question:
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- 12.
Where is the root cap located?
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A
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B
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C
Correct Answer
A. CExplanation
The root cap is located at the tip of the root, covering and protecting the root's growing tip. It is a structure made up of specialized cells that helps in the absorption of water and nutrients, as well as providing protection to the delicate root tissues as it pushes through the soil during growth.Rate this question:
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- 13.
This structure transports water up the stem.
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Sloem
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Phloem
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Xylem
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Tuber
Correct Answer
A. XylemExplanation
Xylem is the correct answer because it is the plant tissue responsible for transporting water and minerals from the roots to the rest of the plant, including the stem. It consists of specialized cells that form tubes, allowing for the upward movement of water through capillary action. The other options listed (sloem, phloem, and tuber) are not involved in water transportation.Rate this question:
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- 14.
This is where the pollen is produced.
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A
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B
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C
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D
Correct Answer
A. CExplanation
Option C is the correct answer because it states that "This is where the pollen is produced." This suggests that the location being referred to is where the process of pollen production takes place.Rate this question:
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- 15.
Which structure is the seed coat?
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A
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B
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C
Correct Answer
A. AExplanation
The correct answer is A. In plants, the seed coat is the protective outer covering of a seed. It is formed from the integuments of the ovule and provides protection to the embryo inside the seed. The seed coat helps to prevent desiccation, mechanical damage, and also acts as a barrier against pathogens.Rate this question:
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- 16.
Which structure is the embryo?
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A
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B
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C
Correct Answer
A. BExplanation
The correct answer is B because it is the only option that is mentioned as a structure. Options A and C do not provide any information about the embryo.Rate this question:
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- 17.
What two ingredients are needed for photosynthesis?
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Water and Oxygen
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Water and Glucose
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Water and Carbon Dioxide
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Glucose and Oxygen
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Glucose and Carbon Dioxide
Correct Answer
A. Water and Carbon DioxideExplanation
Photosynthesis is the process by which plants convert sunlight into energy. Water and carbon dioxide are the two essential ingredients required for this process. Water is absorbed through the plant's roots and transported to the leaves, where it is combined with carbon dioxide from the air. In the presence of sunlight, chlorophyll in the plant's cells uses these two ingredients to produce glucose, a form of sugar, and oxygen as a byproduct. Therefore, water and carbon dioxide are necessary for photosynthesis to occur.Rate this question:
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- 18.
This picture taken with a high-powered microscope is mostly a(n)
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Xylem
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Anther
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Sepals
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Ovary
Correct Answer
A. XylemExplanation
This picture taken with a high-powered microscope is mostly xylem. The image likely shows the vascular tissue of a plant, which is responsible for transporting water and nutrients from the roots to the rest of the plant. Xylem is a type of vascular tissue that consists of hollow, tube-like structures called vessels, which are visible in the image. These vessels are responsible for the upward movement of water in the plant.Rate this question:
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- 19.
What are these structures shown here?
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Petals
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Stamen
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Pistils
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Anthers
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Sepals
Correct Answer
A. Sepals -
- 20.
Which of the following is not a function of the stem?
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Supports the leaves
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Helps transport sugar and water
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Pollination
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Germination
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Both C and D
Correct Answer
A. Both C and DExplanation
Both pollination and germination are not functions of the stem. The stem primarily supports the leaves and helps transport sugar and water throughout the plant. Pollination refers to the transfer of pollen from the male reproductive organ to the female reproductive organ, which is typically carried out by wind, water, or animals. Germination, on the other hand, is the process by which a seed begins to grow and develop into a new plant. These functions are mainly carried out by other parts of the plant such as flowers and seeds, not the stem.Rate this question:
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- 21.
What is the female part of the flower called?
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Stamen
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Pollen Tube
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Pistil
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Sepals
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Anther
Correct Answer
A. PistilExplanation
The female part of the flower is called the pistil. It is the reproductive structure of the flower that contains the ovary, style, and stigma. The ovary contains the ovules, which develop into seeds after fertilization. The style is the slender tube that connects the ovary to the stigma, where pollen is received. The stigma is the sticky or feathery structure at the top of the pistil, which traps pollen grains for fertilization.Rate this question:
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- 22.
Water is transported to the leaves where it combines with ________________ to form sugar.
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Oxygen
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Carbon dioxide
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Glucose
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Carbon monoxide
Correct Answer
A. Carbon dioxideExplanation
Water is transported to the leaves through the xylem vessels. In the leaves, carbon dioxide is taken in through small openings called stomata. Through the process of photosynthesis, carbon dioxide combines with water in the presence of sunlight and chlorophyll to produce glucose, a type of sugar. This glucose is then used by the plant for energy and growth. Therefore, carbon dioxide is the correct answer as it combines with water to form sugar in the leaves.Rate this question:
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- 23.
Which flower structure is this?
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Pistil
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Sepal
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Stamen
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Ovary
Correct Answer
A. StamenExplanation
The given flower structure is the stamen. The stamen is the male reproductive part of a flower, consisting of the filament and the anther. The filament holds up the anther, which is responsible for producing and releasing pollen. The stamen plays a crucial role in the process of pollination and fertilization in plants.Rate this question:
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- 24.
When was this tree cut down?
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2004
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2006
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1998
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2002
Correct Answer
A. 2006Explanation
The tree was cut down in 2006.Rate this question:
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- 25.
Which structure protects the embryo?
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A
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B
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C
Correct Answer
A. AExplanation
The structure that protects the embryo is option A.Rate this question:
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- 26.
Which section of the root protects the newly formed cells from damage?
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A
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B
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C
Correct Answer
A. CExplanation
Section C of the root protects the newly formed cells from damage.Rate this question:
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- 27.
Which structure supplies food to the embryo?
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A
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B
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C
Correct Answer
A. CExplanation
Structure C supplies food to the embryo.Rate this question:
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- 28.
Why does water have this effect on seed germination?
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It allows for additional photosynthesis.
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It softens the seed coat.
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It creates additional cotyledons.
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It adds a root cap to the embryo.
Correct Answer
A. It softens the seed coat.Explanation
Water has this effect on seed germination because it softens the seed coat. The seed coat acts as a protective layer around the seed, and it needs to be softened in order for the seed to absorb water and germinate. When the seed coat is softened, it allows water to penetrate the seed and initiate the germination process. This softening of the seed coat also allows the embryo within the seed to expand and grow, leading to the emergence of a new plant.Rate this question:
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- 29.
What is the variable during this experiment?
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Seeds
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Water
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Germination
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Cotyledon width
Correct Answer
A. WaterExplanation
The variable during this experiment is water. In an experiment, a variable is the factor that is being tested or manipulated. In this case, the experiment likely involves studying the effect of water on the growth or germination of seeds. The other options listed, such as seeds, germination, and cotyledon width, are not variables in this context but rather components or outcomes that may be measured or observed during the experiment.Rate this question:
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- 30.
Phloem is used to transport:
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Water up
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Water down
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Sugar down
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Sugar up
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Seed dispersal
Correct Answer
A. Sugar downExplanation
Phloem is responsible for transporting sugars, specifically glucose and sucrose, from the leaves to other parts of the plant, such as the roots, stems, and fruits. This process is known as translocation. The sugars are produced during photosynthesis in the leaves and are transported downwards to provide energy and nutrients to other plant tissues for growth and metabolism. Therefore, the correct answer is "sugar down."Rate this question:
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.webp "What are these root structures called?")
.webp "What do these root structures do for the plant?")
.webp "Which letter points to the petals?")
.webp "Which structure is an undeveloped plant?")
.webp "Where is the root cap located?")
.webp "This is where the pollen is produced.")
.webp "Which structure is the seed coat?")
.webp "Which structure is the embryo?")
.webp "What are these structures shown here?")
.webp "When was this tree cut down?")
.webp "Which structure protects the embryo?")
.webp "Which structure supplies food to the embryo?")
.webp "Why does water have this effect on seed germination?")
.webp "What is the variable during this experiment?")
Quiz Review Timeline (Updated): Mar 25, 2025 +
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Current Version
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Mar 25, 2025Quiz Edited by
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