$$\text{Fitness} = \frac{\text{Number of surviving offspring}}{\text{Total offspring produced}}$$

Question 1

Which of the following is NOT one of the five fundamental characteristics shared by all living organisms?

Accepted Answer

All organisms must be multicellular.

Question 2

According to the cell theory, which statement is correct?

Accepted Answer

All organisms are made up of cells, and all cells come from preexisting cells.

Question 3

Louis Pasteur’s experiment was designed to test which hypothesis?

Accepted Answer

Cells arise from preexisting cells, not by spontaneous generation.

Question 4

Which of the following best describes the central dogma of molecular biology?

Accepted Answer

DNA codes for RNA, which codes for proteins.

Question 5

A change in the DNA sequence that leads to a change in a protein’s structure may result in:

Accepted Answer

Heritable variation that can drive evolution.

Question 6

Which equation best represents the relationship between fitness and adaptation in a population?

Accepted Answer

$$	ext{Fitness} = \frac{	ext{Number of surviving offspring}}{	ext{Total offspring produced}}$$

Question 7

Which scenario illustrates natural selection in action?

Accepted Answer

A population of bacteria exposed to antibiotics develops resistance over several generations.

Question 8

Which statement about the phylogenetic tree of life is correct?

Accepted Answer

Branches that share a recent common ancestor represent species that are closely related.

Question 9

If the DNA sequence of two species is compared and found to have fewer differences, what does this suggest?

Accepted Answer

The two species are more closely related.

Question 10

Which of the following is a real-world example of adaptation increasing fitness?

Accepted Answer

Finches with small, pointed beaks thriving when small, soft seeds are abundant.

Question 11

Which of the following is NOT a requirement for natural selection to occur?

Accepted Answer

All individuals must have identical traits.

Question 12

Which group of organisms lacks a nucleus?

Accepted Answer

Bacteria

Question 13

What is the primary function of adenosine triphosphate (ATP) in cells?

Accepted Answer

To provide chemical energy for cellular processes.

Question 14

Which statement best describes the process of chemical evolution?

Accepted Answer

Life arose from non-life through a series of chemical reactions early in Earth's history.

Question 15

Which of the following is a plausible consequence of a mistake during DNA copying?

Accepted Answer

Heritable variation that may lead to evolutionary change.

Question 16

Which formula represents the flow of genetic information according to the central dogma?

Accepted Answer

$$	ext{DNA} ightarrow 	ext{RNA} ightarrow 	ext{Protein}$$

Question 17

Which of the following best describes a population in biological terms?

Accepted Answer

A group of individuals of the same species living in the same area at the same time.

Question 18

Which statement about the chromosome theory of inheritance is correct?

Accepted Answer

Genes are units located on chromosomes, which are molecules of DNA.

Question 19

Which of the following is a plausible reason why biologists compare DNA sequences between species?

Accepted Answer

To determine the evolutionary relationships and closeness between species.

Question 20

Which of the following is a correct statement about speciation?

Accepted Answer

Speciation occurs when populations diverge to form new species.

Chapter 1: Biology – The Study of Life (Mini-Textbook Study Notes)

Study Guide - Practice Questions