Question 1

Which of the following best describes homeostasis in living organisms?

Accepted Answer

The ability to maintain stable internal conditions despite changes in the external environment.

Question 2

A scientist wants to test if fertilizer affects plant growth. Which is the independent variable (IV) in this experiment?

Accepted Answer

Amount of fertilizer applied to the plants.

Question 3

Which of the following is an example of adaptation?

Accepted Answer

Camouflage in animals that helps them avoid predators.

Question 4

In an experiment testing the effect of fertilizer on apple production, which variable should be kept constant?

Accepted Answer

Type of apple tree used.

Question 5

Which statement correctly distinguishes a scientific theory from a scientific law?

Accepted Answer

A theory explains why something happens, while a law describes what happens.

Question 6

Which of the following is NOT a characteristic of life?

Accepted Answer

Ability to remain unchanged over time.

Question 7

A student designs an experiment to test how temperature affects enzyme activity. What is the dependent variable (DV)?

Accepted Answer

Enzyme activity measured at different temperatures.

Question 8

Which of the following increases experimental validity?

Accepted Answer

Repeating trials and sharing results for peer review.

Question 9

A biologist observes that a population of fish increases in number when more food is available. Which characteristic of life does this best illustrate?

Accepted Answer

Growth and development.

Question 10

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

Accepted Answer

Plants grown without fertilizer when testing the effect of fertilizer on growth.

Question 11

If a scientist wants to test the hypothesis: 'Increasing sunlight increases plant growth,' which is the dependent variable?

Accepted Answer

Plant growth measured (e.g., height or biomass).

Question 12

Which of the following best describes the process of peer review in scientific research?

Accepted Answer

Sharing detailed results with other scientists for critique.

Question 13

Which equation best represents the relationship between independent variable (IV) and dependent variable (DV) in a simple experiment?

Accepted Answer

$DV = f(IV)$

Question 14

A scientist observes that camouflaged animals survive better in their environment. This observation is best explained by which concept?

Accepted Answer

Adaptation increases an organism's chances of survival and reproduction.

Question 15

Which of the following is a scientific law?

Accepted Answer

Law of Gravity: Objects fall toward Earth due to gravitational attraction.

Question 16

Which of the following scenarios best demonstrates the application of a scientific theory?

Accepted Answer

Using the Theory of Evolution to explain the diversity of species on Earth.

Question 17

In an experiment, why is it important to keep constants the same?

Accepted Answer

To ensure that only the independent variable affects the dependent variable.

Question 18

Which of the following is an example of responding to stimuli?

Accepted Answer

A plant bending toward a light source.

Question 19

A researcher wants to test if the amount of water affects the number of apples produced by a tree. What is the dependent variable?

Accepted Answer

Number of apples produced.

Question 20

Which of the following best explains why repeating trials increases experimental validity?

Accepted Answer

It reduces the impact of random errors and increases reliability of results.

General Biology: Foundations and Scientific Methods

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