Question 1

Which of the following best describes macroevolution?

Accepted Answer

Broad patterns of evolutionary change above the species level, such as the origin of new groups and mass extinctions.

Question 2

Continental drift has played a significant role in macroevolution by:

Accepted Answer

Isolating populations, leading to speciation and changes in biodiversity.

Question 3

Which event marks the relatively sudden appearance of most major animal phyla in the fossil record?

Accepted Answer

Cambrian explosion

Question 4

What is the estimated age of Earth?

Accepted Answer

$$4.5 	ext{ billion years}$$

Question 5

Which process is most likely responsible for the origin of mitochondria and chloroplasts in eukaryotic cells?

Accepted Answer

Serial endosymbiosis

Question 6

A single species of bird arrives on a large island with many empty ecological niches and evolves into several new species, each adapted to a different niche. This is an example of:

Accepted Answer

Adaptive radiation

Question 7

Which piece of evidence best supports the claim that Galapagos finch species arose through adaptive radiation?

Accepted Answer

Galapagos finch species are more closely related to each other than to non-Galapagos finches.

Question 8

Which of the following is the correct chronological order for the appearance of key events in the history of life on Earth?

Accepted Answer

Prokaryotes → Oxygen available → Eukaryotes → Multicellularity

Question 9

Which organelles are believed to have originated from endosymbiosis?

Accepted Answer

Chloroplasts and mitochondria

Question 10

What is a clade in the context of cladistics?

Accepted Answer

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

Question 11

Which of the following is an example of a paraphyletic group?

Accepted Answer

A group containing an ancestor and some, but not all, of its descendants.

Question 12

In a phylogenetic tree, what does a branch point (node) represent?

Accepted Answer

The most recent common ancestor of the taxa that diverge from that point.

Question 13

Which of the following statements about interpreting phylogenetic trees is correct?

Accepted Answer

Sister taxa share a more recent common ancestor with each other than with any other group.

Question 14

Which of the following is NOT a process that can cause macroevolutionary change?

Accepted Answer

Genetic recombination during meiosis

Question 15

Which multicellular organisms were the first to colonize land?

Accepted Answer

Plants

Question 16

Which concept is used to determine the most likely phylogenetic tree based on shared characteristics and the fewest evolutionary changes?

Accepted Answer

Parsimony

Question 17

Which of the following is a real-world example of adaptive radiation?

Accepted Answer

The diversification of mammals after the extinction of dinosaurs.

Question 18

Which of the following statements about the origin of life is supported by laboratory evidence?

Accepted Answer

Ribozymes can self-replicate under laboratory conditions.

Question 19

Which of the following is a monophyletic group?

Accepted Answer

A group containing gorilla, chimpanzee, and human.

Question 20

Which event in Earth's history is most closely associated with a dramatic increase in atmospheric oxygen?

Accepted Answer

The evolution of photosynthetic organisms

Macroevolution and the History of Life on Earth

Study Guide - Practice Questions

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