Question 1

Which of the following is a derived trait unique to land plants and not found in their closest algal relatives?

Accepted Answer

Alternation of generations involving multicellular sporophytes and gametophytes

Question 2

What is the primary adaptive value of alternation of generations in land plants?

Accepted Answer

It allows for both sexual and asexual reproduction, increasing genetic diversity and dispersal ability.

Question 3

Which structure in flowering plants becomes the seed after fertilization?

Accepted Answer

The ovule

Question 4

Double fertilization in angiosperms results in the formation of which two structures?

Accepted Answer

A diploid zygote and triploid endosperm

Question 5

Why is it considered beneficial for vascular plants to have a dominant sporophyte stage compared to a dominant gametophyte stage?

Accepted Answer

The sporophyte is better adapted for dispersal and survival in terrestrial environments due to its vascular tissues.

Question 6

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

Accepted Answer

Regions of active cell division at the tips of roots and shoots, enabling growth in length

Question 7

A plant is described as heterosporous. What does this mean?

Accepted Answer

It produces two types of spores: microspores (male) and megaspores (female)

Question 8

Which equation correctly represents the chromosome number change during fertilization in plants?

Accepted Answer

$$n + n = 2n$$

Question 9

Why do flowering plant gametophytes produce fewer gametes than moss gametophytes?

Accepted Answer

Flowering plant gametophytes are reduced in size and cell number, often consisting of only a few cells.

Question 10

Which part of the flower typically develops into the fruit after fertilization?

Accepted Answer

The ovary

Question 11

What is the main function of stomata in plant leaves?

Accepted Answer

Regulating gas exchange and water loss

Question 12

Which of the following is an example of maternal care in plants?

Accepted Answer

Embryos developing within the tissues of the female parent and receiving nutrients

Question 13

Why do plants produce fruits?

Accepted Answer

To aid in the dispersal of seeds by attracting animals

Question 14

Which of the following best explains why hot peppers are 'hot'?

Accepted Answer

They produce capsaicin to deter herbivores and attract specific seed dispersers

Question 15

Which equation represents the process of meiosis in plants, reducing chromosome number?

Accepted Answer

$$2n \rightarrow n$$

Question 16

What is the name for the male gametophyte in angiosperms?

Accepted Answer

Pollen grain

Question 17

Which of the following is NOT a benefit of plants invading land?

Accepted Answer

Increased exposure to ultraviolet radiation

Question 18

Which of the following best describes the difference between homosporous and heterosporous plants?

Accepted Answer

Homosporous plants produce one type of spore, while heterosporous plants produce two types: microspores and megaspores.

Question 19

Which of the following is considered a vegetable from a scientific perspective?

Accepted Answer

Any edible part of a plant that is not a fruit or seed

Question 20

Why is dispersal by seed generally more beneficial than dispersal by spore in land plants?

Accepted Answer

Seeds contain stored nutrients and protective coatings, increasing survival in harsh environments.

Plant Evolution, Life Cycles, and Reproduction: Key Concepts in General Biology

Study Guide - Practice Questions