Question 1

Which of the following is NOT one of the five unifying themes in biology as described in Chapter 1?

Accepted Answer

Homeostasis

Question 2

A scientist is studying the way nutrients cycle through an ecosystem, focusing on how energy flows and matter is recycled. Which unifying theme of biology is most directly being addressed?

Accepted Answer

Energy and Matter

Question 3

Which property of life is illustrated by a plant growing toward a light source?

Accepted Answer

Response to the environment

Question 4

According to cell theory, which statement is correct?

Accepted Answer

All living organisms are made of cells.

Question 5

Which of the following best describes a eukaryotic cell?

Accepted Answer

It contains membrane-enclosed organelles, including a nucleus.

Question 6

Which domain includes organisms that are mostly single-celled and are the most numerous and diverse eukaryotes?

Accepted Answer

Protists

Question 7

Which process describes the conversion of genetic information from DNA to a functional protein?

Accepted Answer

Gene expression

Question 8

In the context of biological organization, which level comes directly above 'organism'?

Accepted Answer

Population

Question 9

Which of the following statements about natural selection is TRUE?

Accepted Answer

Natural selection leads to adaptation as advantageous traits become more common.

Question 10

A population of beetles has green and brown color variants. Birds preferentially eat green beetles, so brown beetles survive and reproduce more. Over generations, the population becomes mostly brown. Which concept does this scenario best illustrate?

Accepted Answer

Natural selection

Question 11

Which equation best represents the central dogma of molecular biology?

Accepted Answer

$$DNA \rightarrow RNA \rightarrow Protein$$

Question 12

Which of the following is a correct statement about the three domains of life?

Accepted Answer

Bacteria and Archaea are both prokaryotic domains.

Question 13

Which of the following is an example of reductionism in biological research?

Accepted Answer

Studying the function of a single enzyme to understand metabolism.

Question 14

Which property of life is demonstrated when a rabbit maintains a constant internal temperature despite changes in the external environment?

Accepted Answer

Regulation

Question 15

Which of the following best explains why viruses are not considered living organisms?

Accepted Answer

They cannot reproduce independently without a host cell.

Question 16

A scientist discovers a new organism that is single-celled, lacks a nucleus, and thrives in extreme environments. To which domain does this organism most likely belong?

Accepted Answer

Archaea

Question 17

Which of the following is a direct result of gene expression?

Accepted Answer

A cell synthesizes a specific protein based on DNA instructions.

Question 18

Which statement about the unity and diversity of life is supported by the theory of evolution?

Accepted Answer

Living organisms are modified descendants of common ancestors.

Question 19

Which of the following is a real-world example of biological interaction?

Accepted Answer

A bee pollinating a flower, benefiting both species.

Question 20

Which of the following best describes the role of DNA in cells?

Accepted Answer

DNA encodes information for building molecules synthesized within the cell.

Chapter 1: Evolution, Themes of Biology, and Scientific Inquiry

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