Question 1

Which of the following best describes the difference between a hypothesis and a theory in scientific research?

Accepted Answer

A hypothesis is a tentative explanation that can be tested, while a theory is a well-supported explanation based on evidence.

Question 2

Which of the following equations correctly represents photosynthesis?

Accepted Answer

$$6CO_2 + 6H_2O \rightarrow C_6H_{12}O_6$ + 6O_2$$

Question 3

A population of deer in a forest increases rapidly, then levels off as resources become limited. Which type of growth does this illustrate?

Accepted Answer

Logistic growth

Question 4

Which of the following is NOT a biotic factor in an ecosystem?

Accepted Answer

Temperature

Question 5

Which process is primarily responsible for the cycling of carbon between the atmosphere and living organisms?

Accepted Answer

Photosynthesis and respiration

Question 6

A scientist observes that frogs in a pond are dying at an increased rate. Which step of the scientific method is the scientist performing?

Accepted Answer

Making an observation

Question 7

Which of the following best describes the concept of carrying capacity ($$K) in $$population ecology?

Accepted Answer

The maximum number of individuals an environment can support indefinitely

Question 8

Which of the following is an example of a mutualistic relationship?

Accepted Answer

Bees pollinating flowers while collecting nectar

Question 9

Which of the following is a density-dependent factor that can affect population growth?

Accepted Answer

Disease

Question 10

Which equation best represents the logistic growth of a population?

Accepted Answer

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

Question 11

Which of the following is a primary producer in most terrestrial ecosystems?

Accepted Answer

Grass

Question 12

Which of the following best explains why energy transfer between trophic levels is inefficient?

Accepted Answer

Most energy is lost as heat due to metabolic processes

Question 13

Which of the following is an example of a keystone species?

Accepted Answer

Sea otters in kelp forests

Question 14

Which of the following is a consequence of habitat fragmentation?

Accepted Answer

Reduced movement of species and increased edge effects

Question 15

Which of the following is a correct statement about the greenhouse effect?

Accepted Answer

It is a natural process that warms the Earth's surface

Question 16

Which of the following best describes the process of nitrogen fixation?

Accepted Answer

Conversion of atmospheric nitrogen ($$N_2) $$into ammonia ($$NH_3) by $$bacteria

Question 17

A population of rabbits is introduced to an island with unlimited resources. Which equation best predicts their population growth?

Accepted Answer

$$N = N_0$ e$$^{rt}$$

Question 18

Which of the following is an example of an invasive species?

Accepted Answer

Zebra mussels in North American lakes

Question 19

Which of the following is a likely result of biomagnification in a food chain?

Accepted Answer

Higher concentrations of toxins in top predators

Question 20

Which of the following best describes sustainable resource management?

Accepted Answer

Using resources at a rate that allows them to replenish for future generations

General Biology Final Exam Review: Key Concepts and Study Guide

Study Guide - Practice Questions