Question 1

Which of the following adaptations was crucial for the colonization of land by plants, allowing them to prevent desiccation of their reproductive cells?

Accepted Answer

Formation of sporopollenin in spore walls

Question 2

The alternation of generations in land plants involves which of the following sequences?

Accepted Answer

Diploid sporophyte → meiosis → haploid spores → mitosis → haploid gametophyte → mitosis → haploid gametes → fertilization → diploid zygote → mitosis → diploid sporophyte

Question 3

Which of the following is NOT a derived trait of land plants?

Accepted Answer

Unicellular embryos

Question 4

Why are bryophyte gametophytes generally small and close to the ground?

Accepted Answer

They lack lignified vascular tissue for structural support

Question 5

Which structure in mosses is responsible for anchoring the gametophyte to the substrate?

Accepted Answer

Rhizoid

Question 6

What is the ecological significance of Sphagnum (peat moss) in global carbon cycling?

Accepted Answer

It forms peatlands that store large amounts of organic carbon, reducing atmospheric CO$$_2$$

Question 7

Which of the following best describes the function of apical meristems in plants?

Accepted Answer

They allow for continuous growth by generating new cells at the tips of roots and shoots

Question 8

In the life cycle of a fern, which stage is dominant and what is its ploidy?

Accepted Answer

Sporophyte, diploid (2n)

Question 9

Which of the following statements about xylem and phloem is correct?

Accepted Answer

Xylem is strengthened by lignin and conducts water; phloem distributes organic products

Question 10

Which of the following events likely contributed to global cooling at the end of the Carboniferous period?

Accepted Answer

Increased photosynthesis by seedless vascular plants, removing CO$$_2$$ from the atmosphere

Question 11

Which of the following is a correct sequence of evolutionary events in plant history?

Accepted Answer

Origin of land plants → origin of vascular plants → origin of seed plants

Question 12

Which of the following best explains why seedless vascular plants are usually restricted to moist environments?

Accepted Answer

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

Question 13

Which of the following is a function of the cuticle in land plants?

Accepted Answer

Prevents water loss from the epidermis

Question 14

A botanist discovers a new plant species with the following characteristics: multicellular gametangia, apical meristems, and walled spores produced in sporangia. To which group does this plant most likely belong?

Accepted Answer

Land plants (embryophytes)

Question 15

Which of the following best describes the role of mycorrhizae in early land plants?

Accepted Answer

They formed symbiotic associations to help plants obtain nutrients from the soil

Question 16

Which of the following is true regarding the dependency of the embryo in land plants?

Accepted Answer

The embryo is retained within the tissue of the female gametophyte and receives nutrients from the parent

Question 17

Which of the following is a correct statement about the sporophyte in bryophytes?

Accepted Answer

It is dependent on the gametophyte for nutrition

Question 18

Which of the following best explains why vascular tissue was a key innovation for plant evolution?

Accepted Answer

It enabled plants to transport water, minerals, and nutrients efficiently, supporting greater height and size

Question 19

Which of the following is a real-world consequence of overharvesting Sphagnum from peatlands?

Accepted Answer

Increased atmospheric CO$$_2$$ due to the release of stored organic carbon

Question 20

Which of the following best describes the difference between archegonia and antheridia in land plants?

Accepted Answer

Archegonia produce eggs and are the site of fertilization; antheridia produce and release sperm

Plant Diversity I: How Plants Colonized Land

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