Question 1

Which of the following provides the strongest evidence supporting the endosymbiotic origin of mitochondria in eukaryotic cells?

Accepted Answer

Mitochondria contain circular DNA and ribosomes similar to those of bacteria.

Question 2

Plasmodium species are responsible for which major human disease, and what is a key feature of their life cycle that complicates treatment?

Accepted Answer

Malaria; multiple stages in both mosquito and human hosts

Question 3

Which adaptation allowed seed plants to reproduce without water, facilitating their spread into diverse terrestrial environments?

Accepted Answer

Production of pollen grains

Question 4

A scientist discovers a new organism with multicellular, filamentous growth, septate hyphae, and the ability to digest cellulose externally. Which group does this organism most likely belong to?

Accepted Answer

Fungi

Question 5

Which of the following best explains why bilateral symmetry is considered a major evolutionary innovation in animals?

Accepted Answer

It allows for the development of a central nervous system and directional movement.

Question 6

Which of the following is a key difference between protostome and deuterostome development?

Accepted Answer

In protostomes, the blastopore becomes the mouth; in deuterostomes, it becomes the anus.

Question 7

Which equation correctly represents the process of photosynthesis in plants?

Accepted Answer

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

Question 8

Which feature distinguishes gymnosperms from angiosperms?

Accepted Answer

Gymnosperms produce naked seeds, while angiosperms produce seeds enclosed in fruit.

Question 9

Which of the following is a mutualistic relationship involving fungi and plant roots that increases nutrient uptake?

Accepted Answer

Arbuscular mycorrhizal fungi (AMF)

Question 10

A population of aquatic protists is observed to have chloroplasts with circular DNA and peptidoglycan in their cell walls. What does this suggest about the evolutionary origin of their chloroplasts?

Accepted Answer

Chloroplasts originated from engulfed cyanobacteria.

Question 11

Which of the following adaptations is most important for preventing water loss in terrestrial plants?

Accepted Answer

Development of a waxy cuticle

Question 12

Which of the following statements about fungal hyphae is correct?

Accepted Answer

Hyphae are multicellular filaments that grow toward food sources and may be divided by septa.

Question 13

Which of the following is a defining characteristic of chordates?

Accepted Answer

Dorsal hollow nerve cord

Question 14

Which evolutionary innovation allowed vertebrates to capture and process food more efficiently, leading to diversification?

Accepted Answer

Evolution of jaws

Question 15

Which of the following best describes the ecological role of fungi as decomposers?

Accepted Answer

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

Question 16

Which of the following is true regarding the alternation of generations in land plants?

Accepted Answer

Both gametophyte and sporophyte generations are multicellular.

Question 17

Which group of animals is characterized by segmentation, jointed appendages, and an exoskeleton?

Accepted Answer

Arthropods

Question 18

Which of the following is a major difference between lophotrochozoans and ecdysozoans?

Accepted Answer

Ecdysozoans undergo ecdysis (molting of the exoskeleton), while lophotrochozoans do not.

Question 19

Which of the following best explains why AMF (arbuscular mycorrhizal fungi) are important for plant health?

Accepted Answer

They increase the surface area for nutrient exchange by growing inside root cells.

Question 20

Which of the following is a key innovation in vertebrate evolution that enabled the transition to terrestrial life?

Accepted Answer

Evolution of amniotic egg

Exam 3 Review General Biology Study Notes: Eukaryotic Diversity, Plants, Fungi, and Animal Evolution (Chapters 27–32)

Study Guide - Practice Questions

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