Question 1

Which of the following best describes the function of the nervous system in animals?

Accepted Answer

It coordinates responses to internal and external stimuli by transmitting electrical signals.

Question 2

A patient is unable to maintain homeostasis due to a malfunction in their endocrine system. Which hormone-related process is most likely affected?

Accepted Answer

Regulation of blood glucose levels by insulin and glucagon

Question 3

Which equation correctly represents the Hardy-Weinberg equilibrium for a population with two alleles, $$p$$ and $$q$$?

Accepted Answer

$$p^2 + 2pq$$ + $$q^2 = 1$

Question 4

During which phase of the cell cycle does DNA replication occur?

Accepted Answer

S phase

Question 5

A population of rabbits is introduced to an island. Over several generations, the average fur color shifts from brown to white. Which evolutionary mechanism is most likely responsible?

Accepted Answer

Natural selection favoring white fur in the snowy environment

Question 6

Which of the following best explains why populations do not grow exponentially indefinitely?

Accepted Answer

Resources such as food and space become limited, leading to logistic growth.

Question 7

Which formula would you use to calculate the net reproductive rate ($$R_0) in a $$population?

Accepted Answer

$$R_0$$ = \sum l_x m_x$$

Question 8

A scientist observes that a certain plant species only flowers when exposed to more than 12 hours of daylight. This is an example of:

Accepted Answer

Photoperiodism

Question 9

Which of the following is a direct result of meiosis in animals?

Accepted Answer

Formation of gametes with half the chromosome number of the parent cell

Question 10

A mutation occurs in the DNA sequence of a gene. Which process is most likely to be affected first?

Accepted Answer

Transcription of mRNA from the mutated gene

Question 11

Which of the following best describes the role of the hypothalamus in the endocrine system?

Accepted Answer

It regulates the release of hormones from the pituitary gland.

Question 12

Which equation represents the logistic growth model for a population?

Accepted Answer

$$\frac{dN}{dt} = rN \left(1 - \frac{N}{K}\right)$$

Question 13

A population of bacteria doubles every hour. If you start with 100 bacteria, how many will you have after 5 hours? Use the exponential growth formula $$N = N_0$ e$$^{rt}$$, where r$$ = \ln(2)$$ per hour.

Accepted Answer

3200

Question 14

Which of the following is NOT a function of animal reproductive systems?

Accepted Answer

Synthesis of neurotransmitters

Question 15

Which process is responsible for the exchange of gases in the lungs?

Accepted Answer

Diffusion across the alveolar membrane

Question 16

A population of insects is exposed to a pesticide. After several generations, most individuals are resistant. Which concept does this illustrate?

Accepted Answer

Natural selection

Question 17

Which of the following best describes the principle of competitive exclusion?

Accepted Answer

No two species can occupy the same niche in the same habitat for long.

Question 18

Which of the following is a direct consequence of crossing over during meiosis?

Accepted Answer

Increased genetic variation among gametes

Question 19

Which equation would you use to calculate the population growth rate ($$r) $$given birth rate ($$b) $$and death rate ($$d$$)?

Accepted Answer

$$r = b - d$$

Question 20

A scientist is studying the effect of temperature on enzyme activity. Which variable is the independent variable in this experiment?

Accepted Answer

Temperature

General Biology 182: Course Schedule and Key Topics Study Guide

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