Question 1

Which of the following best distinguishes Bacteria from Archaea?

Accepted Answer

Bacteria have peptidoglycan in their cell walls, while Archaea do not.

Question 2

A scientist discovers a microorganism living in a hot spring with a temperature of 90°C and a pH of 2. Which term best describes this organism?

Accepted Answer

Acidophilic thermophile

Question 3

Which process is responsible for the transfer of genetic material between bacterial cells via a pilus?

Accepted Answer

Conjugation

Question 4

Cyanobacteria are ecologically significant because they:

Accepted Answer

Are the only prokaryotes capable of oxygenic photosynthesis

Question 5

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

Accepted Answer

A life cycle in which multicellular haploid and multicellular diploid stages alternate

Question 6

Which adaptation allowed plants to colonize land by reducing water loss?

Accepted Answer

Development of a waxy cuticle

Question 7

A protist that moves using flagella and is capable of both photosynthesis and heterotrophy is best described as:

Accepted Answer

Mixotrophic

Question 8

Which of the following is a derived trait found in all land plants but absent in their closest algal relatives?

Accepted Answer

Multicellular dependent embryo

Question 9

Which of the following best explains why seeds are an important evolutionary adaptation for plants?

Accepted Answer

Seeds protect the embryo and provide a food supply, allowing plants to colonize dry environments.

Question 10

Which of the following best describes the ecological role of decomposer bacteria?

Accepted Answer

They break down dead organic matter, recycling nutrients into the ecosystem.

Question 11

A plant species is found in a desert environment and has small, needle-like leaves and thick cuticles. Which adaptation is most likely being exhibited?

Accepted Answer

Adaptation to reduce water loss in arid conditions

Question 12

Which of the following is NOT a characteristic of angiosperms?

Accepted Answer

Production of cones

Question 13

Which process is responsible for the conversion of atmospheric nitrogen ($N_2$) into ammonia ($NH_3$) by certain bacteria?

Accepted Answer

Nitrogen fixation

Question 14

Which of the following best describes the relationship between mycorrhizal fungi and plant roots?

Accepted Answer

Mutualism, where both the fungus and the plant benefit

Question 15

Which of the following correctly matches the protist group with its primary mode of locomotion?

Accepted Answer

Ciliates — movement by cilia

Question 16

Which of the following is a key difference between the life cycles of bryophytes and seedless vascular plants?

Accepted Answer

Bryophytes have a dominant gametophyte generation, while seedless vascular plants have a dominant sporophyte generation.

Question 17

Which of the following best describes double fertilization in angiosperms?

Accepted Answer

One sperm fertilizes the egg, and another sperm fuses with two polar nuclei to form the endosperm.

Question 18

Which of the following is a real-world example of coevolution between plants and animals?

Accepted Answer

The evolution of brightly colored flowers to attract specific pollinators

Question 19

Which of the following best explains why protists are considered a paraphyletic group?

Accepted Answer

They include some, but not all, descendants of their most recent common ancestor.

Question 20

A plant biologist is studying a new species that produces both microspores and megaspores. Which term best describes this reproductive strategy?

Accepted Answer

Heterospory

General Biology Study Guide: Bacteria, Archaea, Protists, and Plant Diversity

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