NEET Biology: Sexual Reproduction in Flowering Plants — Practice Set 5

Q1. Which of the following statements about ornithophilous pollination is correct?

A. Bird-pollinated flowers are often red, tubular, and odorless.
B. Bird-pollinated flowers are typically blue and strongly scented.
C. Bird-pollinated flowers rely primarily on wind for pollen transfer.
D. Bird-pollinated flowers produce heavy, sticky pollen.

Q2. Which of the following is NOT a function of the stigma in flowering plants?

A. To receive pollen grains
B. To secrete substances that facilitate pollen adhesion and germination
C. To produce nectar for attracting pollinators
D. To act as a selective barrier for compatible pollen

Q3. Which sequence correctly describes the events of double fertilization?

A. Pollen lands on stigma, pollen tube grows, one sperm fuses with the egg, the other fuses with the two polar nuclei
B. Pollen lands on stigma, pollen tube grows, both sperm fuse with the egg
C. Pollen lands on style, pollen tube grows, one sperm fuses with the egg, and then the pollen tube degenerates
D. Pollen lands on stigma, two pollen tubes form, each carrying one sperm to the egg

Q4. Which of the following best defines sexual reproduction in flowering plants?

A. A process involving only vegetative propagation.
B. The formation of new individuals by the fusion of male and female gametes.
C. The production of offspring by mitosis.
D. A method of reproduction that does not involve any genetic variation.

Q5. Which of the following is NOT a mechanism of sexual reproduction in flowering plants?

A. Double fertilization
B. Self-pollination
C. Apomixis
D. Cross-pollination

Q6. Which of the following statements about floral morphology and pollination efficiency is correct?

A. Distinct floral traits, such as color, shape, and nectar guides, enhance pollinator attraction and improve pollination efficiency.
B. Floral morphology has no influence on pollination.
C. Simple, inconspicuous flowers always ensure higher pollination success.
D. Floral morphology only affects self-pollination processes.

Q7. Most angiosperms have which type of ovule?

A. Unitegmic and orthotropous
B. Bitegmic and anatropous
C. Bitegmic and orthotropous
D. Unitegmic and anatropous

Q8. An aggregate fruit is produced by:

A. Fusion of ovaries from multiple flowers
B. Fusion of multiple carpels within a single flower
C. Development of accessory tissues outside the ovary
D. Coalescence of separate ovules in a single ovary

Q9. Which pollination type is characterized by the absence of showy petals and relies on wind for pollen transfer?

A. Zoophily
B. Entomophily
C. Anemophily
D. Hydrophily

Q10. Which mechanism(s) is/are employed by many flowering plants to prevent self-pollination?

A. Dichogamy
B. Herkogamy
C. Self-incompatibility
D. All of the above

Biology — Sexual Reproduction in Flowering Plants

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Which of the following statements about ornithophilous pollination is correct?

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