Question 1

Which of the following best explains why diatoms are important in marine food webs?

Accepted Answer

They are primary producers that perform photosynthesis, forming the base of the food chain.

Question 2

Which of the following is a defining feature of the Phylum Bryophyta (mosses)?

Accepted Answer

They lack true vascular tissue such as xylem and phloem.

Question 3

A scientist discovers a new aquatic organism that is photosynthetic, has a cell wall made of cellulose, and stores energy as starch. To which kingdom does this organism most likely belong?

Accepted Answer

Plantae

Question 4

Which of the following equations correctly represents the process of photosynthesis?

Accepted Answer

$$6CO_2 + 6H_2O \rightarrow C_6H_{12}O_6$ + 6O_2$$

Question 5

Which adaptation allowed plants to colonize terrestrial environments most successfully?

Accepted Answer

Development of vascular tissue for water and nutrient transport

Question 6

Which of the following best describes the symbiotic relationship between mycorrhizal fungi and plants?

Accepted Answer

Mutualism: fungi increase nutrient absorption for plants, and plants provide carbohydrates to fungi.

Question 7

Which of the following is a unique characteristic of animals that distinguishes them from plants and fungi?

Accepted Answer

Presence of nervous and muscle tissue

Question 8

A farmer notices that grape vines infected with powdery mildew (a fungus) grow poorly. Which is the most important reason for this reduced growth?

Accepted Answer

The fungus competes with the plant for nutrients and water, reducing the plant's resources for growth.

Question 9

Which of the following best describes the alternation of generations in plants?

Accepted Answer

A life cycle that alternates between multicellular haploid (gametophyte) and multicellular diploid (sporophyte) stages.

Question 10

Which of the following is a major difference between vascular and nonvascular plants?

Accepted Answer

Vascular plants have specialized tissues (xylem and phloem) for transport; nonvascular plants do not.

Question 11

Which of the following best explains why red algae can live at greater ocean depths than green algae?

Accepted Answer

Red algae possess pigments that absorb blue and green light, which penetrate deeper into water.

Question 12

Which of the following is the correct order of evolutionary appearance in plants?

Accepted Answer

Bryophytes → Ferns → Gymnosperms → Angiosperms

Question 13

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

Accepted Answer

Transport of water and dissolved minerals from roots to shoots

Question 14

A botanist is studying a plant that produces seeds but no flowers. To which group does this plant most likely belong?

Accepted Answer

Gymnosperms

Question 15

Which of the following is a correct statement about the dominant generation in mosses?

Accepted Answer

The gametophyte is the dominant, photosynthetic generation.

Question 16

Which of the following best explains why fungi are classified as heterotrophs?

Accepted Answer

They obtain organic molecules by absorbing nutrients from other organisms.

Question 17

Which of the following is a key difference between animal and fungal heterotrophy?

Accepted Answer

Animals ingest food before digesting it, while fungi digest food externally and then absorb nutrients.

Question 18

Which of the following best describes the ecological role of lichens?

Accepted Answer

They are pioneer species that colonize bare rock and contribute to soil formation.

Question 19

Which of the following is a major adaptation that allowed seed plants to reproduce without water?

Accepted Answer

Production of pollen grains that can be transported by wind or animals

Question 20

Which of the following best explains why vascular plants can grow taller than nonvascular plants?

Accepted Answer

Vascular tissue allows efficient transport of water and nutrients, supporting greater height.

General Biology: Plants, Algae, and Fungi – Study Guide

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