Question 1

Which of the following is NOT one of the four defining characteristics of chordates?

Accepted Answer

Ventral heart

Question 2

A freshwater fish is transferred to a saltwater environment. Which term best describes a species that can survive such a change, and what adaptation would most likely help it survive?

Accepted Answer

Euryhaline; active excretion of excess salts

Question 3

Which of the following best describes the process and outcome of plasmogamy in fungi?

Accepted Answer

Fusion of cytoplasm resulting in dikaryotic cells

Question 4

Which of the following statements about animal energetics is correct?

Accepted Answer

Total energy expenditure increases with body size, but energy per unit mass decreases.

Question 5

In the context of bacterial conjugation, what is the role of an F+ cell?

Accepted Answer

It acts as a donor and transfers the F plasmid to an F- cell.

Question 6

Which of the following best explains why parasitism is a widespread evolutionary strategy?

Accepted Answer

Parasites benefit from reduced energy expenditure by exploiting host resources.

Question 7

Which of the following is a correct sequence for the path of carbohydrate digestion in the human digestive system?

Accepted Answer

Mouth → Stomach → Small intestine

Question 8

Which of the following best describes the interaction between ADH and the RAAS system in regulating blood osmolarity?

Accepted Answer

ADH increases water reabsorption, while RAAS increases sodium reabsorption, both helping to maintain osmolarity.

Question 9

A population is in Hardy-Weinberg equilibrium. If the frequency of allele $$A is$$ $$p = 0.7$$ and allele $$a is$$ $$q = 0.3$$, what is the expected frequency of heterozygotes?

Accepted Answer

$$2pq = 0.42$$

Question 10

Which of the following is a homologous structure to a human arm?

Accepted Answer

A bat's wing

Question 11

Which of the following statements about the nervous system is correct?

Accepted Answer

Nervous system signaling requires electrical changes across membranes.

Question 12

Which of the following best describes the mechanism of countercurrent exchange in fish gills?

Accepted Answer

Blood and water flow in opposite directions, maintaining a concentration gradient for oxygen diffusion.

Question 13

Which of the following is true regarding the release of bacterial toxins?

Accepted Answer

Exotoxins are actively secreted by living bacteria, while endotoxins are released when bacteria die.

Question 14

Which of the following best describes the outcome of hybridization between a horse and a donkey?

Accepted Answer

The offspring (mule) is typically sterile due to chromosomal incompatibility.

Question 15

Which of the following statements about fungal morphology is correct?

Accepted Answer

Hyphae are individual filaments that collectively form a mycelium.

Question 16

Which of the following is a key morphological change that distinguishes tetrapods from other chordates?

Accepted Answer

Development of digits (fingers and toes)

Question 17

Which of the following best describes a 'fixed' locus in population genetics?

Accepted Answer

A locus where only one allele is present in the population

Question 18

Which of the following hypotheses about the origin of the three domains of life is supported by evidence of horizontal gene transfer?

Accepted Answer

Early life forms exchanged genetic material, leading to the mosaic nature of the three domains.

Question 19

When interpreting a phylogenetic tree, which of the following statements is correct?

Accepted Answer

Species that share a more recent common ancestor are more closely related.

Animal Form, Function, and Evolution: Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards