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 process is unique to animals and occurs during early embryonic development?

Accepted Answer

Gastrulation

Question 4

In the context of energy budgets, which statement is TRUE regarding metabolic rate per unit mass?

Accepted Answer

Smaller animals have a higher metabolic rate per unit mass than larger animals.

Question 5

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.

Question 6

Where does the majority of carbohydrate digestion occur in the human digestive system?

Accepted Answer

Small intestine

Question 7

Which of the following statements about countercurrent exchange in fish gills is correct?

Accepted Answer

Countercurrent exchange maintains a concentration gradient that favors oxygen diffusion into the blood.

Question 8

Which of the following best describes the difference between endotoxins and exotoxins?

Accepted Answer

Endotoxins are components of the bacterial cell wall released upon cell death; exotoxins are actively secreted proteins.

Question 9

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

Accepted Answer

It acts as the donor, transferring the F plasmid to the F- cell.

Question 10

Which fungal structure is correctly matched with its description?

Accepted Answer

Hyphae: individual fungal filaments

Question 11

During fungal sexual reproduction, what is the immediate result of plasmogamy?

Accepted Answer

Dikaryotic (n+n) cells

Question 12

Which scientist is correctly matched with their contribution to evolutionary thought?

Accepted Answer

Charles Darwin: descent with modification by natural selection

Question 13

Which of the following is an example of a homologous structure?

Accepted Answer

The flipper of a whale and the human arm

Question 14

A mule is the offspring of a horse and a donkey. Which reproductive barrier does this illustrate?

Accepted Answer

Reduced hybrid fertility

Question 15

Why is parasitism considered a successful evolutionary strategy?

Accepted Answer

It allows the parasite to obtain resources with minimal energy investment.

Question 16

Given a population in Hardy-Weinberg equilibrium with allele frequencies $$p = 0.7$$ and $$q = 0.3$$, what is the expected frequency of homozygous recessive individuals?

Accepted Answer

$$0.09$$

Question 17

If a gene locus is 'fixed' in a population, what does this imply about genetic variability at that locus?

Accepted Answer

All individuals are homozygous for the same allele.

Question 18

Which of the following statements about phylogenetic trees is correct?

Accepted Answer

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

Question 19

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

Accepted Answer

Horizontal gene transfer contributed to the genetic makeup of early domains.

Question 20

Which of the following best describes the speed and requirements of nervous system signaling in animals?

Accepted Answer

It is rapid and depends on electrical changes across membranes.

Animal Form, Function, and Evolution: Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards