Question 1

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

Accepted Answer

A newly derived trait unique to a single lineage or species.

Question 2

A researcher observes that two unrelated desert plants have developed thick, waxy leaves to reduce water loss. This similarity is best explained by which evolutionary process?

Accepted Answer

Convergent evolution

Question 3

Which of the following statements about acquired characteristics is correct?

Accepted Answer

Acquired characteristics are changes due to environmental influence and are not inherited.

Question 4

In a phylogenetic tree, what does a 'node' represent?

Accepted Answer

A point where two or more descendant lineages diverge from a common ancestor.

Question 5

Which of the following best describes the function of the mitochondrion in eukaryotic cells?

Accepted Answer

It generates ATP through cellular respiration.

Question 6

A population of beetles has a gene with two alleles, A and a. If the frequency of A is $$p = 0.7$$ and the frequency of a is $$q = 0.3$$, what is the expected frequency of heterozygotes ($$Aa) $$under Hardy-Weinberg equilibrium?

Accepted Answer

$$0.42$$

Question 7

Which of the following is NOT a function of the cytoskeleton in eukaryotic cells?

Accepted Answer

Synthesizing ATP from glucose.

Question 8

Which of the following best defines a 'clade'?

Accepted Answer

A group that includes an ancestor and all its descendants.

Question 9

Which of the following is a correct example of binomial nomenclature?

Accepted Answer

Homo sapiens

Question 10

A scientist is using a dichotomous key to identify an unknown plant species. What is the primary purpose of a dichotomous key in taxonomy?

Accepted Answer

To associate an unknown organism with a known species based on characteristics.

Question 11

Which of the following best explains why prokaryotes are considered a paraphyletic group?

Accepted Answer

They include an ancestor but not all its descendants (eukaryotes are excluded).

Question 12

Which of the following is an example of a symbiotic relationship where one species lives off the metabolic products of another?

Accepted Answer

Bacteria in the human gut producing vitamins for the host.

Question 13

Which of the following is a correct description of the process of recombination?

Accepted Answer

The shuffling of genetic material during sexual reproduction, increasing genetic diversity.

Question 14

Which of the following best describes the principle of parsimony in phylogenetic analysis?

Accepted Answer

The simplest explanation for a phenomenon is most likely correct.

Question 15

Which of the following is a key difference between eukaryotic and prokaryotic cells?

Accepted Answer

Eukaryotic cells have a nucleus, while prokaryotic cells do not.

Question 16

A population of bacteria is exposed to an antibiotic. Over time, only those with a mutation conferring resistance survive and reproduce. This is an example of:

Accepted Answer

Natural selection

Question 17

Which of the following best describes the function of ribosomes in a cell?

Accepted Answer

They are sites of protein synthesis from amino acids.

Question 18

Which of the following is an example of divergent evolution?

Accepted Answer

Darwin's finches evolving different beak shapes from a common ancestor.

Question 19

Which of the following is a correct statement about mutations?

Accepted Answer

Mutations are permanent alterations in DNA sequence.

Question 20

Which of the following best describes the role of the cell membrane?

Accepted Answer

It is a phospholipid bilayer that controls the movement of molecules and ions into and out of the cell.

Evolution, Phylogeny, and Cell Structure: Study Notes for General Biology

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