CLEP - Biology Plant Reproduction and Structure Questions and Answers

Question 1

In angiosperms, which of the following structures is the female reproductive organ that contains the ovules?

Accepted Answer

Pistil

Answer

Stamen

Answer

Petal

Answer

Sepal

Question 2

Which of the following statements accurately describes the process of double fertilization in flowering plants?

Accepted Answer

One sperm nucleus fertilizes the egg to form the zygote, and the other fuses with the two polar nuclei to form the endosperm.

Answer

Two sperm nuclei fertilize two separate eggs, resulting in twin embryos.

Answer

A single sperm nucleus divides within the ovule to fertilize both the egg and a polar nucleus.

Answer

Two pollen grains are required to land on the stigma to fertilize the egg and the central cell separately.

Question 3

In the life cycle of a fern, which of the following structures represents the dominant, diploid (2n) sporophyte generation?

Accepted Answer

The mature frond

Answer

The prothallus

Answer

A spore

Answer

The archegonium

Question 4

A botanist examining a plant stem cross-section observes vascular tissue composed of non-living cells forming continuous tubes. This tissue is found to be responsible for the bulk flow of water and dissolved minerals from the roots. Which tissue is being observed?

Accepted Answer

Xylem

Answer

Phloem

Answer

Epidermis

Answer

Parenchyma

Question 5

A plant species produces seeds that are lightweight and possess large, feathery structures. These adaptations are most characteristic of which primary mode of seed dispersal?

Accepted Answer

Dispersal by wind (anemochory)

Answer

Dispersal by animals (zoochory)

Answer

Dispersal by water (hydrochory)

Answer

Mechanical self-dispersal (autochory)

Question 6

A houseplant on a windowsill bends towards the light. This directional growth, known as phototropism, is primarily caused by the unequal distribution of which plant hormone?

Accepted Answer

Auxin

Answer

Gibberellin

Answer

Ethylene

Answer

Abscisic acid