Question 1

Which of the following best describes the process of natural selection?

Accepted Answer

Organisms with more favorable traits are able to produce more offspring and pass on their traits.

Question 2

A scientist observes that a population of insects develops resistance to a pesticide over several generations. Which biological principle does this scenario best illustrate?

Accepted Answer

Evolution

Question 3

Which of the following is NOT a characteristic of all living things?

Accepted Answer

Ability to photosynthesize

Question 4

Which level of biological organization includes all living and nonliving factors in a given area?

Accepted Answer

Ecosystem

Question 5

A group of giraffes, all the plants, animals, and bacteria in the same area together form which level of organization?

Accepted Answer

Community

Question 6

Which statement best explains why homeostasis is important for living organisms?

Accepted Answer

It keeps internal conditions stable despite external changes.

Question 7

Which of the following is an example of adaptation?

Accepted Answer

A polar bear having thick fur to survive in cold climates.

Question 8

Which principle states that all living things are made up of cells and all cells come from other cells?

Accepted Answer

Cell theory

Question 9

If two different species of birds compete for the same type of food in a forest, this is an example of:

Accepted Answer

Competition

Question 10

Which of the following best describes a biosphere?

Accepted Answer

The part of Earth where all life exists

Question 11

Which of the following best illustrates the concept of gene theory?

Accepted Answer

Genes are passed from parents to offspring and determine characteristics.

Question 12

A scientist discovers a new organism that can detect changes in its environment, grow, and reproduce. Which additional characteristic must it have to be classified as living?

Accepted Answer

Ability to maintain homeostasis

Question 13

Which of the following relationships is an example of symbiosis?

Accepted Answer

A bee pollinating a flower

Question 14

Which of the following is the correct order of biological organization from smallest to largest?

Accepted Answer

Population → Community → Ecosystem → Biome → Biosphere

Question 15

Which of the following best describes the role of chemical reactions in living organisms?

Accepted Answer

They help organisms maintain homeostasis by enabling cells to obtain and use energy.

Question 16

Which of the following is an example of competition?

Accepted Answer

Two plants growing close together and both needing sunlight

Question 17

Which of the following statements about evolution is correct?

Accepted Answer

Evolution is the process by which organisms become more suited to their environment through adaptations.

Question 18

Which of the following is NOT a unifying principle of biology?

Accepted Answer

Photosynthesis

Question 19

A population of bacteria is exposed to an antibiotic. Over time, only those with a mutation that resists the antibiotic survive and reproduce. This is an example of:

Accepted Answer

Natural selection

Question 20

Which of the following best explains why all living things are made up of cells?

Accepted Answer

Cells are the basic unit of structure and function in living things.

Basics of Biology: Fundamental Concepts and Principles

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