Question 1

Which of the following best describes the dominant generation in the life cycle of bryophytes?

Accepted Answer

The haploid gametophyte, which is dominant and provides nutrition to the sporophyte.

Question 2

In seedless vascular plants such as ferns, what evolutionary advantage does heterospory provide?

Accepted Answer

It forces cross-fertilization by producing distinct male and female gametophytes.

Question 3

Which structure in mosses protects gametes from harsh environmental conditions?

Accepted Answer

Archegonia and antheridia (collectively called gametangia)

Question 4

What is the primary function of lignin in vascular plants?

Accepted Answer

To provide structural support and allow for efficient water transport

Question 5

Which equation correctly represents the chromosome number change during fertilization in the plant life cycle?

Accepted Answer

$$N + N \rightarrow 2N$$

Question 6

A botanist discovers a plant with a dominant sporophyte, true roots, stems, and leaves, but no seeds. Which group does this plant most likely belong to?

Accepted Answer

Seedless vascular plants (such as ferns)

Question 7

Why is self-fertilization generally considered maladaptive in seedless vascular plants?

Accepted Answer

It increases the risk of expressing maladaptive traits due to homozygosity.

Question 8

Which adaptation allowed early land plants to colonize drier habitats?

Accepted Answer

Evolution of vascular tissue and lignin

Question 9

In the life cycle of ferns, what is the role of the gametophyte?

Accepted Answer

It produces gametes by mitosis.

Question 10

Which of the following is a real-world ecological impact of peat moss (Sphagnum) in peat bogs?

Accepted Answer

It stores large amounts of carbon, slowing climate change.

Question 11

A student observes a plant with small, leaf-like structures, no true roots, and a sporophyte that depends on the gametophyte for nutrition. Which plant group is this most likely?

Accepted Answer

Bryophytes

Question 12

Which process in the plant life cycle restores the diploid number after gametes are produced?

Accepted Answer

Fertilization

Question 13

In ferns, what is the function of the antheridiogen hormone released by early-maturing gametophytes?

Accepted Answer

It causes later-maturing gametophytes to develop as males, reducing self-fertilization.

Question 14

Which of the following best explains why bryophytes are often found in damp environments?

Accepted Answer

Their sperm are flagellated and require water to swim to the egg.

Question 15

Which of the following is TRUE about the sporophyte in mosses?

Accepted Answer

It is small and nutritionally dependent on the gametophyte.

Question 16

Which plant group is characterized by the presence of vessel elements and seeds enclosed in fruit?

Accepted Answer

Angiosperms

Question 17

What is the main difference between homosporous and heterosporous seedless vascular plants?

Accepted Answer

Homosporous plants produce one type of spore; heterosporous produce two types (megaspores and microspores).

Question 18

Which of the following is a direct consequence of the evolution of vascular tissue in plants?

Accepted Answer

Plants could grow taller and colonize drier habitats.

Question 19

Which of the following correctly describes the process of spore formation in ferns?

Accepted Answer

Spores are produced by meiosis in the sporophyte.

Question 20

Which of the following best explains the role of peat moss in climate regulation?

Accepted Answer

Peat moss stores carbon in its tissue, slowing the release of CO$$_2 to $$the atmosphere.

Bryophytes and Ferns: Structure, Life Cycles, and Evolutionary Significance

Guida di studio - Domande di pratica

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