$$\mathrm{C}_6\mathrm{H}_{12}\mathrm{O}_6 + 6\mathrm{O}_2 \rightarrow 6\mathrm{CO}_2 + 6\mathrm{H}_2O + \text{energy}$$

Question 1

Which of the following is NOT a characteristic that defines life according to modern biology?

Accepted Answer

Ability to photosynthesize

Question 2

Viruses are often debated as living or non-living. Which statement best explains why viruses are generally NOT considered truly alive?

Accepted Answer

They do not possess cells or maintain homeostasis

Question 3

Which of the following best describes the difference between autotrophs and heterotrophs?

Accepted Answer

Autotrophs synthesize their own organic compounds from CO$$_2$$; heterotrophs obtain energy by consuming other organisms

Question 4

Which equation correctly represents the process of cellular respiration in chemo-heterotrophs?

Accepted Answer

$$\mathrm{C}_6\mathrm{H}_{12}\mathrm{O}_6 + 6\mathrm{O}_2 ightarrow 6\mathrm{CO}_2 + 6\mathrm{H}_2O + 	ext{energy}$$

Question 5

Which of the following is a correct example of homeostasis in mammals?

Accepted Answer

Sweating to cool down when body temperature rises

Question 6

A scientist observes that maggots only appear on meat when flies can access it. What scientific principle does this experiment illustrate?

Accepted Answer

The importance of controls in experiments

Question 7

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

Accepted Answer

Cell, tissue, organ, organism, population, community, ecosystem, biosphere

Question 8

Which domain contains organisms with membrane-bound nuclei and organelles?

Accepted Answer

Eukarya

Question 9

Which kingdom includes only multicellular, photosynthetic organisms with cell walls made of cellulose?

Accepted Answer

Kingdom Plantae

Question 10

Which of the following statements about evolution is TRUE?

Accepted Answer

Evolution is the accumulation of genetic changes in populations over time

Question 11

A mutation in DNA can be caused by which of the following?

Accepted Answer

Errors during DNA replication by enzymes

Question 12

Which of the following is an example of an adaptation resulting from natural selection?

Accepted Answer

Predators developing sharper teeth

Question 13

Which statement best describes the scientific method?

Accepted Answer

A systematic process involving observation, hypothesis, prediction, experiment, and conclusion

Question 14

Which of the following is a scientific theory?

Accepted Answer

A general and reliable explanation of important natural phenomena, supported by repeated evidence

Question 15

Which of the following is the correct binomial name for the common water flea?

Accepted Answer

Daphnia longispina

Question 16

Which of the following is TRUE about prokaryotic cells?

Accepted Answer

They have circular DNA and lack organelles

Question 17

Which of the following is a correct example of a control in a scientific experiment?

Accepted Answer

A group where the variable being tested is not changed

Question 18

Which of the following is a reason why repeatability is important in scientific experiments?

Accepted Answer

It allows other researchers to verify findings

Question 19

Which of the following is NOT a domain of life?

Accepted Answer

Protista

Question 20

Which of the following is a correct statement about the flow of energy and cycling of nutrients in ecosystems?

Accepted Answer

Energy flows in one direction and nutrients are cycled

Introduction to Life on Earth: Defining Life, Evolution, and Scientific Study

Study Guide - Practice Questions