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21.

What is the primary function of the plant root system?

Transport of sugars

Reproduction

Water and nutrient absorption

Photosynthesis

Explanation Comments

Answer: Water and nutrient absorption

Explanation:

The root system of a plant is primarily responsible for absorbing water and essential nutrients from the soil.

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22.

Which part of the plant contains chlorophyll and is responsible for photosynthesis?

Roots

Leaves

Flowers

Stems

Explanation Comments

Answer: Leaves

Explanation:

Leaves contain chlorophyll, the pigment that plays a key role in photosynthesis, the process by which plants convert light energy into chemical energy.

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23.

What is the function of plant stomata?

Nutrient absorption

Reproduction

Root anchorage

Gas exchange

Explanation Comments

Answer: Gas exchange

Explanation:

Stomata are tiny openings on the surface of leaves that allow for the exchange of gases, such as carbon dioxide and oxygen, between the plant and the environment.

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24.

Which of the following is a non-vascular plant?

Pine tree

Fern

Sunflower

Moss

Explanation Comments

Answer: Moss

Explanation:

Mosses are non-vascular plants, meaning they lack specialized tissues for water and nutrient transport.

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25.

In which plant organ does meiosis occur to produce haploid spores?

Stem

Flower

Sporangium

Leaf

Explanation Comments

Answer: Sporangium

Explanation:

Meiosis occurs within the sporangium, a structure that produces haploid spores in plants.

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26.

Which part of a flower contains the female reproductive structures?

Sepal

Petal

Pistil

Stamen

Explanation Comments

Answer: Pistil

Explanation:

The pistil contains the female reproductive structures, including the ovary, style, and stigma.

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27.

What is the term for the transfer of pollen from the anther to the stigma of a flower?

Germination

Photosynthesis

Pollination

Fertilization

Explanation Comments

Answer: Pollination

Explanation:

Pollination is the process of transferring pollen from the male reproductive part (anther) to the female part (stigma) of a flower.

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28.

What is the primary function of fruits in plants?

Water absorption

Gas exchange

Seed protection

Photosynthesis

Explanation Comments

Answer: Seed protection

Explanation:

Fruits protect and aid in the dispersal of seeds, ensuring the survival and propagation of plant species.

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29.

Which hormone promotes cell elongation and is responsible for phototropism in plants?

Auxin

Abscisic acid

Ethylene

Gibberellin

Explanation Comments

Answer: Auxin

Explanation:

Auxin is a plant hormone that promotes cell elongation and is responsible for the bending of plant stems toward light (phototropism).

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30.

What type of plant tissue is responsible for secondary growth and the formation of wood?

Xylem

Phloem

Cambium

Epidermis

Explanation Comments

Answer: Cambium

Explanation:

Cambium is the tissue responsible for secondary growth in plants, resulting in the formation of wood and increased stem girth.

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