Question 1

Which of the following best describes the process of alternation of generations in plants, as shown in the diagram?

Accepted Answer

A multicellular diploid sporophyte produces haploid spores by meiosis, which develop into a multicellular haploid gametophyte.

Question 2

In the alternation of generations, which structure is diploid (2n)?

Accepted Answer

Sporophyte

Question 3

Which of the following is a key adaptation that allowed plants to colonize land?

Accepted Answer

Presence of a cuticle to prevent desiccation

Question 4

Which structure in the flower diagram is responsible for producing pollen grains?

Accepted Answer

Anther

Question 5

What is the main function of the root hairs in the root system of a flowering plant?

Accepted Answer

Increasing surface area for water and mineral absorption

Question 6

Which of the following best describes the role of mycorrhizae in plant nutrition?

Accepted Answer

They increase the surface area for water and mineral absorption by forming a mutualistic association with plant roots.

Question 7

Which plant hormone is primarily responsible for cell elongation and is produced in the apical meristem?

Accepted Answer

Auxin

Question 8

Which of the following is a characteristic unique to angiosperms?

Accepted Answer

Presence of flowers and fruits

Question 9

Which tissue type is responsible for the transport of water and minerals from roots to the rest of the plant?

Accepted Answer

Xylem

Question 10

A plant is exposed to mechanical stress, such as wind. Which hormone is most likely to be involved in the plant’s triple response?

Accepted Answer

Ethylene

Question 11

Which of the following best explains why legumes are often used in crop rotation to improve soil fertility?

Accepted Answer

They form nodules containing nitrogen-fixing bacteria, increasing soil nitrogen.

Question 12

Which of the following is a function of the vascular cambium in woody plants?

Accepted Answer

Addition of secondary xylem and phloem, leading to increased stem thickness

Question 13

Which of the following is a correct sequence of events in the angiosperm life cycle?

Accepted Answer

Pollination → Fertilization → Seed formation → Germination

Question 14

Which cell type is most specialized for photosynthesis in leaves?

Accepted Answer

Parenchyma cells

Question 15

Which adaptation is most directly responsible for the success of seed plants in dry terrestrial environments?

Accepted Answer

Production of seeds with a protective coat and stored food

Question 16

Which of the following best describes the function of the phloem in vascular plants?

Accepted Answer

Transport of sugars and organic nutrients throughout the plant

Question 17

Which process allows plants to absorb positively charged mineral ions from the soil?

Accepted Answer

Cation exchange

Question 18

Which structure in the flower diagram is the site where fertilization occurs?

Accepted Answer

Ovary

Question 19

Which of the following is a major difference between monocots and eudicots?

Accepted Answer

Monocots have parallel leaf venation, while eudicots have net-like venation.

Question 20

Which hormone is most closely associated with promoting seed dormancy and inhibiting germination?

Accepted Answer

Abscisic acid (ABA)

Plant Evolution, Structure, Nutrition, and Reproduction: Study Guide for BIOL 191A (Chapters 26–31)

Study Guide - Practice Questions