Question 1

Which of the following best describes a monophyletic group on a phylogenetic tree?

Accepted Answer

A group that includes a common ancestor and all of its descendants.

Question 2

A scientist discovers two species with similar streamlined bodies adapted for swimming, but genetic analysis shows they are distantly related. This similarity is best explained by:

Accepted Answer

Convergent evolution resulting in homoplasy.

Question 3

Which of the following statements about the three domains of life is correct?

Accepted Answer

Archaea and Eukarya are more closely related to each other than either is to Bacteria.

Question 4

The endosymbiotic theory explains the origin of which organelles in eukaryotic cells?

Accepted Answer

Mitochondria and chloroplasts

Question 5

During primary endosymbiosis, which of the following events occurs?

Accepted Answer

A eukaryotic cell engulfs a prokaryote, which becomes an organelle.

Question 6

Which of the following best describes lateral gene transfer?

Accepted Answer

The movement of genetic material between organisms other than by descent from parent to offspring.

Question 7

In the plant life cycle, which process produces haploid spores?

Accepted Answer

Meiosis

Question 8

Which of the following is a key evolutionary innovation that allowed vertebrates to reproduce away from water?

Accepted Answer

The amniotic egg

Question 9

A botanist is studying a plant that has vascular tissue, produces seeds, but does not have flowers or fruit. To which group does this plant most likely belong?

Accepted Answer

Gymnosperms

Question 10

Which of the following statements about animal evolution is correct?

Accepted Answer

Segmentation evolved independently in multiple animal lineages.

Question 11

Which of the following best explains the evolutionary advantage provided by the engulfment of an aerobic bacterium by an ancestral eukaryotic cell?

Accepted Answer

It enabled the host cell to generate ATP efficiently through aerobic respiration.

Question 12

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

Accepted Answer

The gametophyte is haploid $$(n)$$ and produces gametes by mitosis.

Question 13

A researcher finds a group of organisms that are multicellular, eukaryotic, and heterotrophic by ingestion, but lack cell walls. To which kingdom do these organisms most likely belong?

Accepted Answer

Animalia

Question 14

Which of the following events would make the traditional group 'protists' monophyletic?

Accepted Answer

Including plants, animals, and fungi within the group.

Question 15

Which of the following best describes the process of secondary endosymbiosis?

Accepted Answer

A eukaryote engulfs another eukaryote that already contains a chloroplast.

Question 16

Which of the following correctly matches the dominant generation with the plant group?

Accepted Answer

Bryophytes – gametophyte

Question 17

Which of the following is a real-world example of convergent evolution?

Accepted Answer

The independent evolution of wings in bats and insects.

Question 18

Which of the following best explains how Hox gene duplication contributed to animal diversity?

Accepted Answer

It allowed for the evolution of more complex body plans by increasing the number of developmental regulatory genes.

Question 19

In the evolutionary history of vertebrates, which trait appeared immediately after the notochord?

Accepted Answer

Vertebral column

Question 20

Which of the following statements about meiosis and mitosis in plant life cycles is correct?

Accepted Answer

Meiosis produces spores; mitosis produces gametes.

General Biology Exam 3 Core Concepts: Step-by-Step Study Guidance

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