Q: Which equation best represents the relationship between the frequency of a favorable trait in a population after several generations of natural selection?

$f_{n+1} = f_n + s \times (1 - f_n)$

Question 1

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

Accepted Answer

Species accumulate differences from their ancestors as they adapt to different environments over generations.

Question 2

Which scientist proposed that Earth's geological features were formed gradually, influencing Darwin's thinking about biological change?

Accepted Answer

James Hutton

Question 3

Artificial selection differs from natural selection in that:

Accepted Answer

Artificial selection involves humans breeding organisms for specific traits.

Question 4

Which observation led Darwin to infer that individuals with advantageous traits tend to leave more offspring?

Accepted Answer

All species can produce more offspring than the environment can support.

Question 5

A population of bacteria is exposed to an antibiotic. After several generations, most bacteria are resistant. Which principle of natural selection does this scenario illustrate?

Accepted Answer

Natural selection selects for traits already present in the population.

Question 6

Which of the following is NOT a feature of natural selection?

Accepted Answer

Natural selection causes individuals to evolve during their lifetime.

Question 7

Which type of evidence for evolution is provided by the similarity of vertebrate embryos having post-anal tails and pharyngeal arches?

Accepted Answer

Homology

Question 8

Why do islands often have endemic species that are closely related to species on the nearest mainland?

Accepted Answer

Mainland species colonize islands and adapt to new environments, leading to speciation.

Question 9

Which of the following statements about evolutionary trees is correct?

Accepted Answer

Evolutionary trees reflect hypotheses about relationships among groups, using data such as anatomy and DNA sequences.

Question 10

Which equation best represents the relationship between the frequency of a favorable trait in a population after several generations of natural selection?

Accepted Answer

$f_{n+1} = f_n + s 	imes (1 - f_n)$

Question 11

Which scenario is an example of convergent evolution?

Accepted Answer

Wings in bats and birds evolving independently for flight.

Question 12

Which scientist developed the binomial format for naming species and a classification system grouping similar species into increasingly inclusive categories?

Accepted Answer

Carl Linnaeus

Question 13

According to Darwin, what is the primary mechanism that explains the unity and diversity of life?

Accepted Answer

Natural selection

Question 14

Which of the following is a direct observation supporting evolution by natural selection?

Accepted Answer

The evolution of drug-resistant bacteria in hospitals.

Question 15

Which principle did Lamarck propose that is NOT supported by experimental evidence?

Accepted Answer

Inheritance of acquired characteristics

Question 16

Which of the following best explains why the fossil record is important for understanding evolution?

Accepted Answer

It provides evidence of the extinction of species, the origin of new groups, and changes within groups over time.

Question 17

A population of finches on an island has a variety of beak shapes. Over time, those with deeper beaks survive better during droughts. What is the most likely outcome after several generations?

Accepted Answer

The frequency of deep beaks will increase in the population.

Question 18

Which of the following statements about populations and evolution is correct?

Accepted Answer

Populations evolve over time as favorable traits become more common.

Question 19

Which concept is illustrated by the branching pattern of Darwin's evolutionary tree?

Accepted Answer

Multiple groups of organisms share a common ancestor and diverge over time.

Question 20

Which formula would you use to estimate the number of offspring surviving to reproduce in a population, given the total number of offspring $N$ and the survival rate $r$?

Accepted Answer

$S = N 	imes r$

Descent with Modification: The Darwinian View of Life (Chapter 22 Study Notes)

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