Question 1

Which of the following best describes the relationship between natural selection and evolution?

Accepted Answer

Natural selection is an explanation for how evolution happens.

Question 2

A caterpillar that is camouflaged is more likely to reproduce because it is less likely to be eaten by a bird. Is this statement more directly related to evolution or natural selection?

Accepted Answer

Natural selection

Question 3

Which organism will have the highest fitness, based on the evolutionary definition of fitness?

Accepted Answer

Organism C lives for 1 year, is relatively small, and produces 3 offspring.

Question 4

Which statement would be supported by the concept of common descent?

Accepted Answer

Many similarities between species exist because they were inherited from the same ancestor.

Question 5

Dog breeds are defined by denoting breed standards, a list of agreed-upon traits that individuals of that breed should possess. Dog shows rank dogs based on their adherence to these breed standards. Which statement about dog breeds is correct?

Accepted Answer

Breed standards use an idealized form to which dogs are compared; this reflects typological thinking.

Question 6

What is one reason population thinking is so important in biology?

Accepted Answer

Population thinking requires scientists to consider the full variation that is present in nature.

Question 7

The Latin term 'Scala Naturae' reflects which argument?

Accepted Answer

Aristotle’s argument that organisms can be arranged hierarchically by complexity.

Question 8

True or False: In tree thinking, species are organized from low complexity to high complexity.

Accepted Answer

False; in tree thinking, species are organized based on evolutionary relationships.

Question 9

Which of the following statements is FALSE based on the simplified phylogenetic tree shown below? (Assume a tree with Cucumber, Apple, Pear, Cotton, Orange, and California Poppy)

Accepted Answer

The cucumber is equally related to the apple and the pear.

Question 10

Based on the phylogenetic tree of big cats (Jaguar, Lion, Leopard, Snow Leopard, Tiger), which two species are most closely related?

Accepted Answer

Lion and Leopard

Question 11

Which of the following best describes 'fitness' in an evolutionary context?

Accepted Answer

The likelihood that an individual contributes offspring to the next generation.

Question 12

Which of the following is an example of population thinking?

Accepted Answer

Focusing on the variation among individuals within a species.

Question 13

Which of the following is a key difference between ladder thinking and tree thinking in evolutionary biology?

Accepted Answer

Ladder thinking organizes species by complexity, while tree thinking organizes species by common descent.

Question 14

A population of beetles lives in a forest where birds can easily spot and eat bright green beetles, but brown beetles are camouflaged. Over generations, the population becomes mostly brown. Which process best explains this change?

Accepted Answer

Natural selection

Question 15

Which of the following best illustrates the concept of adaptation?

Accepted Answer

A trait that makes an organism well-suited to its environment.

Question 16

In a phylogenetic tree, what does a node represent?

Accepted Answer

A common ancestor shared by descendant lineages.

Question 17

Which of the following is NOT a requirement for natural selection to occur?

Accepted Answer

All individuals must survive and reproduce equally.

Question 18

If two species share a more recent common ancestor with each other than with a third species, what can you infer about their evolutionary relationship?

Accepted Answer

They are more closely related to each other than to the third species.

Question 19

Which of the following best describes the concept of 'descent with modification'?

Accepted Answer

Species change over time, giving rise to new species with inherited traits.

Introduction to Evolution and Natural Selection: Key Concepts and Phylogenetic Thinking

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