Q11. Which of the following is NOT a type of angiosperm?
a) Magnoliopsida
b) Liliopsida
c) Coniferopsida
d) Eudicotyledons
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Correct Answer: c) Coniferopsida
Explanation: Coniferopsida refers to gymnosperms, not angiosperms. Magnoliopsida and Liliopsida are classes of angiosperms, and Eudicotyledons are a subclass of dicots.
Q12. The tissue responsible for lateral growth in stems and roots of woody plants is called:
a) Epidermis
b) Phloem
c) Xylem
d) Cambium
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Correct Answer: d) Cambium
Explanation: Cambium is a meristematic tissue that undergoes cell division, leading to secondary growth in stems and roots of woody plants. It produces secondary xylem and phloem, contributing to the increase in girth or diameter of the plant.
Q13. Which of the following is NOT a function of roots in angiosperms?
a) Absorption of water and minerals
b) Anchoring the plant in soil
c) Photosynthesis
d) Storage of food
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Correct Answer: c) Photosynthesis
Explanation: Roots in angiosperms primarily function in absorption of water and minerals, anchoring the plant, and storing food. Photosynthesis occurs primarily in leaves, where chlorophyll is abundant.
Q14. The outermost whorl of a flower, typically green in color, is called:
a) Petal
b) Stamen
c) Leaflet
d) Sepal
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Correct Answer: d) Sepal
Explanation: Sepals are the outermost whorl of a flower, often green in color. They protect the flower bud before it opens and support the petals once the flower blooms. Petals are typically colorful and attractive, while stamens and pistils are reproductive structures.
Q15. The process by which pollen is transferred from an anther to a stigma is called:
a) Fertilization
b) Pollination
c) Germination
d) Transpiration
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Correct Answer: b) Pollination
Explanation: Pollination is the transfer of pollen from an anther to a stigma, either within the same flower (self-pollination) or between different flowers (cross-pollination). It is a crucial step in the sexual reproduction of flowering plants.
Q16. Which of the following is NOT a characteristic feature of monocots?
a) Parallel venation
b) Fibrous root system
c) Vascular bundles scattered in stem
d) Netted venation
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Correct Answer: d) Netted venation
Explanation: Monocots typically exhibit parallel venation in their leaves, a fibrous root system, and vascular bundles scattered throughout the stem. Netted venation is characteristic of dicots.
Q17. The male gamete of an angiosperm plant is contained within a:
a) Pollen grain
b) Ovule
c) Embryo sac
d) Style
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Correct Answer: a) Pollen grain
Explanation: The male gamete of an angiosperm is contained within a pollen grain, which is produced by the anther of a stamen. Pollen grains are dispersed by various agents, such as wind, insects, or animals, for pollination.
Q18. Which of the following is NOT a type of fruit in angiosperms?
a) Berry
b) Nut
c) Cone
d) Legume
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Correct Answer: c) Cone
Explanation: Cones are reproductive structures found in gymnosperms, not angiosperms. Angiosperms produce fruits, which can be classified into various types such as berry, nut, legume, drupe, etc.
Q19. The specialized cells responsible for the movement of sugars and other organic nutrients in angiosperms are called:
a) Xylem vessels
b) Companion cells
c) Sieve tubes
d) Tracheids
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Correct Answer: c) Sieve tubes
Explanation: Sieve tubes are specialized cells found in the phloem of angiosperms, responsible for transporting sugars and other organic nutrients throughout the plant. Companion cells provide metabolic support to sieve tubes, while xylem vessels and tracheids transport water and minerals.
Q20. The part of a flower where pollen grains are produced is called:
a) Ovary
b) Stigma
c) Anther
d) Style
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Correct Answer: c) Anther
Explanation: The anther is the part of a flower where pollen grains are produced. It is located at the tip of the stamen, the male reproductive organ of a flower. Pollen grains contain the male gametes necessary for fertilization.