CLEP Biology Plant Reproduction and Structure 2

Question 1

Which tissue in a plant seed stores nutrients to support early embryo growth?

Accepted Answer

Endosperm

Answer

Endosperm is the nutrient-rich tissue in seeds that provides food for the developing embryo before photosynthesis can begin.

Question 2

In angiosperms, double fertilization produces which two structures?

Accepted Answer

Zygote and endosperm nucleus

Answer

Double fertilization in angiosperms produces a diploid zygote (2n) and a triploid endosperm nucleus (3n).

Question 3

What is the function of the micropyle in a seed?

Accepted Answer

Allows water and oxygen entry for germination

Answer

The micropyle is a small pore in the seed coat through which water and gases enter to initiate germination.

Question 4

Which of the following is a characteristic unique to monocot seeds compared to dicot seeds?

Accepted Answer

One cotyledon

Answer

Monocots have a single cotyledon (seed leaf), while dicots have two cotyledons, which is the defining structural difference.

Question 5

Seed dormancy is MOST directly broken in many species by:

Accepted Answer

Prolonged cold treatment (stratification)

Answer

Stratification, exposure to cold and moist conditions over time, breaks dormancy in many temperate species by reducing ABA levels.

CLEP Practice Test