Question 1

Which of the following best describes the process of double fertilization in angiosperms?

Accepted Answer

One sperm fertilizes the egg to form a diploid zygote, and another sperm fuses with two nuclei to form a triploid endosperm.

Question 2

A botanist discovers a plant species in which the gametophyte is the dominant, independent stage of the life cycle. To which group does this plant most likely belong?

Accepted Answer

Mosses

Question 3

Which floral structure is responsible for producing pollen grains?

Accepted Answer

Anther

Question 4

A seed is dissected and found to have a single cotyledon. Which of the following is most likely true about this plant?

Accepted Answer

It is a monocot.

Question 5

Which of the following best explains why wind-pollinated flowers typically lack bright petals and strong scents?

Accepted Answer

They do not need to attract animal pollinators.

Question 6

During seed germination, which structure typically emerges first and why is this advantageous?

Accepted Answer

The root, because it absorbs water and minerals necessary for growth.

Question 7

Which of the following is a function of the endosperm in a seed?

Accepted Answer

It provides stored food for the developing embryo.

Question 8

A flower is missing both stamens and carpels. Which term best describes this flower?

Accepted Answer

Incomplete flower

Question 9

Which of the following best describes the alternation of generations in plants?

Accepted Answer

A life cycle alternating between a diploid sporophyte and a haploid gametophyte.

Question 10

Which of the following adaptations would most likely be found in a plant species whose seeds are dispersed by water?

Accepted Answer

Fruits with buoyant, waterproof coverings

Question 11

A plant produces flowers that are red, tubular, and have little scent. Which pollinator is this plant most likely adapted to attract?

Accepted Answer

Hummingbirds

Question 12

Which of the following best describes the role of the tube cell in the pollen grain?

Accepted Answer

It forms the pollen tube that delivers sperm to the ovule.

Question 13

Which of the following is a real-world example of coevolution between plants and their pollinators?

Accepted Answer

Orchids that mimic female wasps to attract male wasps for pollination.

Question 14

Which process ensures that seeds of temperate plants germinate in the spring rather than in the fall?

Accepted Answer

Exposure to cold temperatures breaks seed dormancy.

Question 15

A scientist observes a flower with fused, tube-shaped petals and a strong scent. Which pollinator is this flower most likely adapted for?

Accepted Answer

Moths

Question 16

Which of the following best explains why some seeds require their seed coat to be disrupted before germination?

Accepted Answer

To ensure that sufficient water is available for the plant to complete its life cycle.

Question 17

Which of the following correctly matches a flower part with its function?

Accepted Answer

Stigma – receives pollen during pollination

Question 18

A plant produces edible fruits with small seeds that survive passage through an animal’s digestive tract. What is the primary advantage of this adaptation?

Accepted Answer

It allows seeds to be dispersed far from the parent plant.

Question 19

Which of the following best describes the difference between a complete and an incomplete flower?

Accepted Answer

A complete flower has all four floral parts; an incomplete flower is missing one or more.

Question 20

Which of the following equations best represents the ploidy changes during double fertilization in angiosperms?

Accepted Answer

$$n + n \rightarrow 2n ($$zygote); $$n + n + n \rightarrow 3n ($$endosperm)

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