Question 1

Which organ is primarily responsible for the chemical breakdown of food using hydrochloric acid and enzymes?

Accepted Answer

Stomach

Question 2

A population is defined as:

Accepted Answer

A group of organisms of the same species living in the same area

Question 3

Which of the following is a correct sequence for the flow of energy in an ecosystem?

Accepted Answer

Producers $$\rightarrow$$ Consumers $$\rightarrow$$ Decomposers

Question 4

Which of the following is an example of a specialized cell that functions against pathogens?

Accepted Answer

Lymphocyte

Question 5

Which process is responsible for converting glucose and oxygen into carbon dioxide, water, and energy in living organisms?

Accepted Answer

Cellular respiration

Question 6

Which equation correctly represents photosynthesis?

Accepted Answer

$$6\mathrm{CO}_2 + 6\mathrm{H}_2\mathrm{O} \rightarrow \mathrm{C}_6\mathrm{H}_{12}\mathrm{O}_6 + 6\mathrm{O}_2$$

Question 7

Which of the following best describes an autotroph?

Accepted Answer

An organism that produces its own food using sunlight or chemical energy

Question 8

In a food web, what would happen if all primary consumers were removed?

Accepted Answer

Secondary consumers would decrease due to lack of food

Question 9

Which of the following is a defining characteristic of amphibians compared to reptiles?

Accepted Answer

Amphibians have moist skin and undergo metamorphosis

Question 10

Which of the following is NOT a function of the large intestine?

Accepted Answer

Production of digestive enzymes

Question 11

Which of the following is the main source of energy for most life on Earth?

Accepted Answer

Solar energy

Question 12

Which of the following best describes the role of decomposers in an ecosystem?

Accepted Answer

They break down dead organisms and recycle nutrients

Question 13

Which of the following is a correct definition of biodiversity?

Accepted Answer

The variety of life in all its forms, levels, and combinations

Question 14

Which of the following is a keystone species in many aquatic ecosystems?

Accepted Answer

Phytoplankton

Question 15

Which of the following is a correct description of a community in biology?

Accepted Answer

All the populations of different species living in the same area

Question 16

Which of the following is a correct formula for cellular respiration?

Accepted Answer

$$\mathrm{C}_6\mathrm{H}_{12}\mathrm{O}_6 + 6\mathrm{O}_2 ightarrow 6\mathrm{CO}_2 + 6\mathrm{H}_2\mathrm{O} + 	ext{energy}$$

Question 17

Which of the following is a function of the liver in the digestive system?

Accepted Answer

Production of bile to aid in fat digestion

Question 18

Which of the following is a defining feature of prokaryotic cells?

Accepted Answer

Lack of membrane-bound organelles

Question 19

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

Accepted Answer

Bees pollinating flowers while obtaining nectar

Question 20

Which of the following is a correct definition of a niche in ecology?

Accepted Answer

The role and position a species has in its environment

General Biology: Key Concepts, Human Body Systems, Biodiversity, and Ecology

Study Guide - Practice Questions