Question 1

Which of the following is strong evidence that land plants evolved from green algae?

Accepted Answer

Both have rings of proteins that synthesize cellulose in their cell walls.

Question 2

Which group of green algae is considered the closest living relative to land plants?

Accepted Answer

Charophytes

Question 3

Which of the following is NOT a challenge plants faced when moving to land?

Accepted Answer

Increased sunlight availability

Question 4

Which of the following is a derived trait of land plants that is absent in charophytes?

Accepted Answer

Alternation of generations

Question 5

In the alternation of generations, which process produces haploid gametes from the gametophyte?

Accepted Answer

Mitosis

Question 6

Which statement best describes the sporophyte generation in land plants?

Accepted Answer

It is diploid and produces spores by meiosis.

Question 7

Which of the following best explains why the alternation of generations is advantageous for land plants?

Accepted Answer

It allows for both sexual and asexual reproduction, increasing genetic diversity and survival in variable environments.

Question 8

Which of the following is a key adaptation that helped plants prevent desiccation (drying out) on land?

Accepted Answer

Formation of a cuticle

Question 9

A plant’s gametophyte generation is characterized by which of the following?

Accepted Answer

It is haploid and produces gametes by mitosis.

Question 10

Which of the following best describes the relationship between sporophyte and gametophyte generations in mosses?

Accepted Answer

The gametophyte is the dominant, photosynthetic generation.

Question 11

Which of the following equations correctly represents the process by which a sporophyte produces spores?

Accepted Answer

$$2n \xrightarrow{meiosis} n$$

Question 12

Which of the following is a real-world example of a plant adaptation to terrestrial life?

Accepted Answer

Presence of stomata to regulate gas exchange and water loss

Question 13

Which of the following statements about the alternation of generations is correct?

Accepted Answer

The sporophyte and gametophyte generations alternate, with one being diploid and the other haploid.

Question 14

Which of the following is a key difference between the life cycles of ferns and mosses?

Accepted Answer

Ferns have a dominant sporophyte generation, while mosses have a dominant gametophyte generation.

Question 15

Which of the following best explains why the presence of abundant CO$$_2 in $$the atmosphere was advantageous for early land plants?

Accepted Answer

CO$$_2 is a $$key reactant in photosynthesis, allowing plants to produce more glucose.

Question 16

Which of the following is a correct sequence of events in the alternation of generations in land plants?

Accepted Answer

Sporophyte (2n) produces spores (n) by meiosis $$\rightarrow$$ Spores grow into gametophytes (n) $$\rightarrow$$ Gametophytes produce gametes (n) by mitosis $$\rightarrow$$ Gametes fuse to form zygote (2n)

Question 17

Which of the following is a real-world consequence if plants had not evolved a cuticle?

Accepted Answer

Plants would be more susceptible to desiccation and unable to colonize dry terrestrial environments.

Question 18

Which of the following best describes the function of stomata in land plants?

Accepted Answer

They allow for gas exchange while minimizing water loss.

Question 19

Which of the following is a correct description of the process of fertilization in the plant life cycle?

Accepted Answer

Fusion of two haploid gametes to form a diploid zygote

Question 20

Which of the following adaptations is most directly responsible for the ability of land plants to grow upright and reach greater heights?

Accepted Answer

Development of vascular tissue

Chapter 26 – The Colonization of Land: Plant Evolution and Adaptations

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