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

Question 1

Which of the following best describes an emergent property in biological systems?

Accepted Answer

A property that arises due to the arrangement and interaction of components at lower levels of organization.

Question 2

Why are horses and donkeys considered different species?

Accepted Answer

Their offspring are sterile and cannot produce viable, fertile offspring.

Question 3

Which of the following is an example of adaptation in plants for water conservation?

Accepted Answer

Needle-like cactus leaves.

Question 4

What is the correct order of levels of biological organization from smallest to largest?

Accepted Answer

Molecule, organelle, cell, tissue, organ, organism, population, community, ecosystem, biosphere

Question 5

Which statement about DNA is correct?

Accepted Answer

DNA encodes traits using a tetranary code of four nucleotides: A, T, C, and G.

Question 6

Which process is an example of negative feedback regulation in living organisms?

Accepted Answer

High blood glucose triggers increased insulin release, which lowers blood glucose.

Question 7

What is the main function of the autonomic nervous system in higher animals?

Accepted Answer

Directing 'flight or fight' responses to stimuli.

Question 8

Which of the following is a correct example of homeostasis?

Accepted Answer

Maintaining a constant body temperature despite changes in external temperature.

Question 9

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

Accepted Answer

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

Question 10

Which of the following best explains why a bird’s hollow bones are an adaptation for flight?

Accepted Answer

They reduce the bird’s weight, making flight more efficient.

Question 11

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

Accepted Answer

Ability to remain unchanged over generations.

Question 12

What is the role of decomposers in the chemical cycling of an ecosystem?

Accepted Answer

They return chemicals to the soil by breaking down dead organisms.

Question 13

Which of the following best describes the relationship between structure and function in biology?

Accepted Answer

Structure determines function, as seen in enzymes and mitochondria.

Question 14

Which of the following is an example of a plant responding to a stimulus?

Accepted Answer

A plant growing toward light due to phototropism.

Question 15

Which process is most directly responsible for maintaining the constancy of internal conditions in living things?

Accepted Answer

Homeostasis

Question 16

Which of the following is a multi-step process that integrates both energy flow and chemical cycling in an ecosystem?

Accepted Answer

Plants absorb light energy, convert it to chemical energy, and decomposers return chemicals to the soil.

Question 17

Which formula best represents the relationship between glucose and insulin in negative feedback regulation?

Accepted Answer

$$	ext{High } [	ext{glucose}] ightarrow 	ext{Increase insulin release} ightarrow 	ext{Decrease } [	ext{glucose}]$$

Question 18

Which of the following is true about reproduction and heredity?

Accepted Answer

Traits are inherited through DNA from both parents in sexual reproduction.

Question 19

Which of the following is a correct example of a scientific inquiry?

Accepted Answer

Formulating a hypothesis and testing it through controlled experiments.

Question 20

Which of the following best describes the role of autotrophs in an ecosystem?

Accepted Answer

They use sunlight to create chemical nutrients for themselves and other organisms.

Chapter 1: Evolution, the Themes of Biology, and Scientific Inquiry – Study Notes

Study Guide - Practice Questions