Question 1

Biology is best defined as the study of which of the following?

Accepted Answer

Living organisms and life processes

Question 2

Which of the following explanations is acceptable in science for explaining observable phenomena?

Accepted Answer

Natural explanations

Question 3

A hypothesis in the scientific method is best described as:

Accepted Answer

A testable prediction based on observations

Question 4

Why do scientists no longer accept the hypothesis that an Ice Age caused dinosaur extinction?

Accepted Answer

There is no evidence of an Ice Age at the time of extinction

Question 5

Which of the following is NOT considered an essential property of life?

Accepted Answer

Breathing

Question 6

Which of the following best defines homeostasis? Give an example.

Accepted Answer

The ability to maintain a stable internal environment, such as human body temperature regulation

Question 7

What is the main difference between an organelle and an organ?

Accepted Answer

Organelles are structures within cells, organs are structures made of tissues

Question 8

What is the smallest level of biological organization that has all the properties of life?

Accepted Answer

Cell

Question 9

Which of the following best defines a population of pine trees in a forest?

Accepted Answer

All the pine trees of the same species in the forest

Question 10

Which of the following is the correct definition of evolution?

Accepted Answer

The change in the genetic makeup of a population over time

Question 11

Which of the following lists the three Domains of life?

Accepted Answer

Bacteria, Archaea, Eukarya

Question 12

Which of the following best describes an element?

Accepted Answer

A substance that cannot be broken down into simpler substances by chemical means

Question 13

Which subatomic particle has a negative charge and is found outside the nucleus?

Accepted Answer

Electron

Question 14

Isotopes of an element have the same number of protons but different numbers of ________.

Accepted Answer

Neutrons

Question 15

What is the valence shell of an atom?

Accepted Answer

The outermost shell of electrons

Question 16

How do electrons form covalent bonds?

Accepted Answer

By sharing pairs of electrons between atoms

Question 17

Which of the following best describes a molecule?

Accepted Answer

A group of atoms bonded together

Question 18

Which of the following is a compound?

Accepted Answer

$$\mathrm{H}_2\mathrm{O}$$

Question 19

How do electrons form ionic bonds?

Accepted Answer

By transferring electrons from one atom to another

Question 20

Why does water take a long time to heat up and cool down?

Accepted Answer

Because of hydrogen bonding between water molecules

General Biology Study Guide: Life, Chemistry, and Macromolecules

Study Guide - Practice Questions