Question 1

Which of the following best describes the principle of 'descent with modification' as proposed by Darwin?

Accepted Answer

Living species are descendants of ancestral species, and genetic changes accumulate over generations.

Question 2

Which of the following is an example of microevolution?

Accepted Answer

A change in the frequency of a gene variant (allele) in a population of moths over several generations.

Question 3

Which scientist proposed that organisms could acquire traits during their lifetime and pass them on to their offspring, a concept later disproven?

Accepted Answer

Jean-Baptiste de Lamarck

Question 4

Which of the following best explains why birds on the Galapagos Islands had unique beak shapes compared to those on the mainland?

Accepted Answer

They adapted to different environmental pressures, leading to natural selection of advantageous traits.

Question 5

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

Accepted Answer

Unlimited resources in the environment

Question 6

A population of bacteria is exposed to an antibiotic. Over time, most bacteria die, but a few survive and reproduce. Which mechanism best explains the increase in antibiotic resistance in this population?

Accepted Answer

Natural selection

Question 7

Which of the following statements about homologous structures is correct?

Accepted Answer

They are anatomical features that share a common evolutionary origin, even if their functions differ.

Question 8

Which of the following best illustrates the concept of 'survival of the fittest'?

Accepted Answer

Individuals with inherited traits that provide an advantage in their environment are more likely to survive and reproduce.

Question 9

Which of the following is an example of direct observation as evidence for evolution?

Accepted Answer

The increase in soapberry bug beak length in response to the introduction of a new plant species.

Question 10

Which of the following best describes the difference between analogous and homologous structures?

Accepted Answer

Homologous structures share a common evolutionary origin, while analogous structures evolved independently to serve similar functions.

Question 11

A scientist finds a fossil of a fish in a sedimentary rock layer. The rock layer is dated to be 200 million years old. What type of evidence for evolution does this represent?

Accepted Answer

Fossil record

Question 12

Which of the following best explains why islands often have unique species not found anywhere else in the world?

Accepted Answer

Isolation leads to populations evolving independently, resulting in endemic species.

Question 13

Which of the following statements about genetic variation is true?

Accepted Answer

Genetic variation arises from mutations and sexual reproduction.

Question 14

In humans, how many chromosomes are found in a typical gamete (egg or sperm cell)?

Accepted Answer

$$23$$

Question 15

Which of the following best describes the process of meiosis in sexual reproduction?

Accepted Answer

It produces haploid gametes with unique combinations of alleles due to crossing over and independent assortment.

Question 16

Which of the following is an example of artificial selection?

Accepted Answer

Humans breeding dogs for specific traits such as size or temperament.

Question 17

Which of the following equations correctly represents the diploid number of chromosomes ($$2n) in $$humans, given that $$n is $$the number of chromosomes in a gamete?

Accepted Answer

$$2n = 46$$

Question 18

Which of the following best describes the role of mutations in evolution?

Accepted Answer

Mutations are the original source of genetic variation, providing raw material for evolution.

Question 19

Which of the following scenarios best demonstrates biogeographical evidence for evolution?

Accepted Answer

Marsupials in Australia are more closely related to each other than to mammals elsewhere, due to long-term geographic isolation.

Question 20

Which of the following statements about genotype and phenotype is correct?

Accepted Answer

Phenotype is determined by the genotype and environmental influences.

Evolution and the Evidence for Evolution

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