Question 1

Which of the following best explains why the average beak size of Galapagos finches increased after a drought?

Accepted Answer

Finches with larger beaks were better able to crack hard seeds, increasing their survival and reproduction.

Question 2

Which evidence supports the endosymbiotic origin of mitochondria in eukaryotic cells?

Accepted Answer

Mitochondria have their own single, circular DNA similar to bacterial DNA.

Question 3

Which process is most responsible for the rapid evolution of multicellular organisms around 500-600 million years ago?

Accepted Answer

Aerobic metabolism, which produces more ATP than anaerobic metabolism.

Question 4

According to the principles of natural selection, which statement is correct?

Accepted Answer

Populations evolve over generations, not individuals.

Question 5

Which scenario best illustrates convergent evolution?

Accepted Answer

Marsupial sugar gliders and placental flying squirrels both evolved gliding adaptations independently.

Question 6

What is the main reason parthenogenesis leads to low genetic variation in a population?

Accepted Answer

Offspring are genetically identical to the parent, reducing diversity.

Question 7

Which of the following is a direct result of continental drift on species distribution?

Accepted Answer

Similar species found on different continents, such as the southern beech tree in South America, Australia, and New Zealand.

Question 8

Which experiment provided evidence for the abiotic formation of organic molecules on early Earth?

Accepted Answer

Stanley Miller’s experiment simulating early Earth conditions.

Question 9

Why is variation in traits within a population essential for evolution by natural selection?

Accepted Answer

It allows some individuals to survive and reproduce under changing environmental conditions.

Question 10

Which statement about artificial selection is correct?

Accepted Answer

Humans select for desired traits, leading to rapid changes in species over generations.

Question 11

Which of the following best describes the RNA World Hypothesis?

Accepted Answer

RNA acted as both a catalyst and genetic material before DNA evolved.

Question 12

A fossil is found with a C-14 to C-12 ratio of 0.25. If the half-life of C-14 is 5,730 years, approximately how old is the fossil? Use the formula $$ t = n 	imes 5730 $$, where $$ n  is $$the number of half-lives.

Accepted Answer

$$ n = 2 $$ half-lives, so $$ t = 2 	imes 5730 = 11,460 $$ years

Question 13

Which of the following is NOT a correct statement about the fossil record?

Accepted Answer

All fossils found in deeper strata are identical to those in surface strata.

Question 14

Which of the following is a misconception associated with Lamarck’s theory of evolution?

Accepted Answer

Acquired characteristics during an organism’s lifetime can be inherited by offspring.

Question 15

Which of the following best explains why antibiotics do not create resistance in bacteria?

Accepted Answer

Antibiotics select for bacteria that already possess resistance genes.

Question 16

Which of the following is a key difference between taxonomy and phylogeny?

Accepted Answer

Taxonomy classifies organisms by shared characteristics; phylogeny shows evolutionary relationships.

Question 17

Which of the following is a real-world example of artificial selection in plants?

Accepted Answer

Cabbage, broccoli, and kale were selectively bred from wild mustard.

Question 18

Which molecular evidence can be used to estimate the time of divergence between two species?

Accepted Answer

Comparing DNA sequences from both species.

Question 19

Which of the following best describes the process of evolution by natural selection?

Accepted Answer

It is a process of editing existing variation, not creating new traits.

Question 20

Which of the following is a correct statement about the Linnaean classification system?

Accepted Answer

It uses a binomial system, giving each species a two-part name.

Evolutionary Biology: Mechanisms, Evidence, and Origins

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