Question 1

Which adaptation is most responsible for the ability of seed plants to colonize dry terrestrial environments?

Accepted Answer

Production of seeds with stored food and protective coat

Question 2

In seed plants, what is the primary evolutionary advantage of pollen?

Accepted Answer

It allows fertilization to occur without water

Question 3

Which of the following best describes heterospory in seed plants?

Accepted Answer

Production of two types of spores: microspores and megaspores

Question 4

A seed consists of which components?

Accepted Answer

Embryo, food supply, and protective coat

Question 5

Which equation correctly represents the ploidy changes during fertilization in seed plants?

Accepted Answer

$$n + n \rightarrow 2n$$

Question 6

Why are reduced gametophytes advantageous in seed plants?

Accepted Answer

They are protected from environmental stress and receive nutrients from the sporophyte

Question 7

Which of the following is true about gymnosperms?

Accepted Answer

They bear naked seeds typically on cones

Question 8

What is the function of the pollen tube in seed plant reproduction?

Accepted Answer

It delivers sperm directly to the female gametophyte within the ovule

Question 9

Which equation best represents double fertilization in angiosperms?

Accepted Answer

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

Question 10

Which real-world scenario illustrates the advantage of seed dispersal by wind?

Accepted Answer

Fireweed seeds colonizing the Mount St. Helens blast zone after a volcanic eruption

Question 11

Which phylum of gymnosperms is most diverse and includes conifers such as pines and firs?

Accepted Answer

Coniferophyta

Question 12

What is the main difference between monocots and eudicots?

Accepted Answer

Monocots have one cotyledon, eudicots have two

Question 13

Which of the following is a key adaptation of angiosperms that contributes to their diversity?

Accepted Answer

Flowers and fruits

Question 14

Which process occurs when a pollen grain lands on a stigma and the pollen tube grows toward the ovule?

Accepted Answer

Pollination

Question 15

Which equation represents the relationship between seed dormancy and environmental conditions?

Accepted Answer

$$	ext{Seed Dormancy} ightarrow 	ext{Germination when conditions are favorable}$$

Question 16

Which of the following is a threat to plant diversity and human welfare?

Accepted Answer

Habitat destruction leading to loss of plant species and associated animals

Question 17

Which group of seed plants is most important for human food production?

Accepted Answer

Angiosperms

Question 18

Which adaptation in flowers increases the likelihood of cross-pollination?

Accepted Answer

Bilateral symmetry restricting pollinator movement

Question 19

Which equation best describes the nutritional relationship in seed plants?

Accepted Answer

$$	ext{Seed} = 	ext{Embryo} + 	ext{Food supply} + 	ext{Protective coat}$$

Question 20

Which scenario best illustrates the mutual evolutionary influence between plants and animals?

Accepted Answer

Pollinators and flowering plants evolving mutually beneficial adaptations

Plant Diversity II: The Evolution of Seed Plants – Study Notes

Study Guide - Practice Questions