$$\text{Light energy} \rightarrow \text{Chemical energy} \rightarrow \text{Heat}$$

Question 1

Which of the following is NOT one of the five unifying themes in biology as described in the study materials?

Accepted Answer

Reproduction

Question 2

Emergent properties in biological systems are best described as:

Accepted Answer

Characteristics that arise from the interaction and arrangement of parts as complexity increases

Question 3

Which statement best explains the relationship between structure and function in biology?

Accepted Answer

The function of a biological structure can be inferred from its shape and organization

Question 4

A cell is considered the basic unit of life because:

Accepted Answer

It is the smallest unit that can perform all activities required for life

Question 5

Which of the following correctly distinguishes prokaryotic and eukaryotic cells?

Accepted Answer

Eukaryotic cells have membrane-enclosed organelles, including a nucleus; prokaryotic cells do not

Question 6

The process by which genetic information in DNA is used to synthesize a functional protein is called:

Accepted Answer

Gene expression

Question 7

Which equation best represents the flow of energy in an ecosystem?

Accepted Answer

$$	ext{Light energy} ightarrow 	ext{Chemical energy} ightarrow 	ext{Heat}$$

Question 8

Feedback regulation in biological systems most commonly involves:

Accepted Answer

Negative feedback, where the response reduces the initial stimulus

Question 9

Which of the following is an example of positive feedback in biological systems?

Accepted Answer

Blood clotting, where the end product speeds up its own production

Question 10

Which domain includes organisms that are mostly single-celled and lack a nucleus?

Accepted Answer

Bacteria

Question 11

The unity of life is best illustrated by which of the following examples?

Accepted Answer

The universal genetic language of DNA found in all organisms

Question 12

According to Darwin’s theory, natural selection results in:

Accepted Answer

Adaptation of organisms to their environment

Question 13

Which of the following best describes the process of descent with modification?

Accepted Answer

Species are modified descendants of common ancestors

Question 14

Which of the following is a real-world consequence of human interactions with the environment as described in the study materials?

Accepted Answer

Global warming due to increased burning of fossil fuels and release of $$	ext{CO}_2$$

Question 15

Which of the following is NOT a property of life?

Accepted Answer

Inability to respond to the environment

Question 16

Which of the following best explains why energy cannot be recycled in an ecosystem?

Accepted Answer

Some energy is lost as heat during energy transformations

Question 17

A population of mice living in a sandy environment has light-colored fur. This trait is most likely an example of:

Accepted Answer

Evolutionary adaptation to blend into their habitat

Question 18

Which of the following best describes the cycling of chemicals in an ecosystem?

Accepted Answer

Chemicals cycle within an ecosystem and are recycled

Question 19

Which of the following is a correct example of negative feedback regulation in humans?

Accepted Answer

Insulin secretion in response to high blood glucose levels

Question 20

Which of the following best describes the role of gene expression in cells?

Accepted Answer

It is the process by which information from a gene is used to build a cellular product

Unifying Themes and Properties of Life in Biology

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