Question 1

Which of the following best describes the role of a hypothesis in the scientific method?

Accepted Answer

A hypothesis is a proposed and testable explanation for an observation.

Question 2

In the scientific method, which step comes immediately after making an observation?

Accepted Answer

Ask a question

Question 3

A scientist observes that a desk lamp does not work. They hypothesize that the bulb is burnt out and predict that replacing the bulb will fix the problem. What is the next step?

Accepted Answer

Test the prediction by replacing the bulb

Question 4

Which of the following is a correct definition of an independent variable?

Accepted Answer

A variable manipulated by the researcher to determine its influence on the dependent variable.

Question 5

In an experiment testing the effect of water on plant growth, what is the dependent variable?

Accepted Answer

Plant growth

Question 6

Which of the following best describes a negative control in an experiment?

Accepted Answer

A control group where no response is expected, preventing false positives.

Question 7

Which of the following is NOT a characteristic of life?

Accepted Answer

Being composed only of multicellular organisms.

Question 8

Which of the following best illustrates the concept of homeostasis?

Accepted Answer

Salt concentration in blood remains relatively steady, regardless of a person’s diet.

Question 9

At which level of the organizational hierarchy does life first emerge?

Accepted Answer

The cellular level

Question 10

Which of the following is the best example of an emergent property?

Accepted Answer

Cells are made of simple molecules, but when organized together, these molecules can perform living functions.

Question 11

Which of the following is true of natural selection?

Accepted Answer

a, b, & c

Question 12

A population of squirrels experiences several unusually cold winters. Squirrels with an extra layer of fat have more offspring. This is an example of:

Accepted Answer

Natural selection

Question 13

Which branch of biology is concerned with the naming and classifying of organisms?

Accepted Answer

Taxonomy

Question 14

Which of the following kingdoms is NOT part of the Eukaryotic Domain?

Accepted Answer

Kingdom Eubacteria

Question 15

Biologists can divide living organisms into two groups: autotrophs and heterotrophs, which differ in:

Accepted Answer

Their method of obtaining energy.

Question 16

Which of the following shows the correct order of steps in the scientific method?

Accepted Answer

Observation → Hypothesis → Experiment → Data Analysis → Conclusion → Peer Review & Publish.

Question 17

Which of the following statements about the cell theory is FALSE?

Accepted Answer

All cells arise spontaneously.

Question 18

A scientist wants to study the effects of nitrogen on wheat plants. They set up an experiment with 4 groups of plants: group A gets 20 pounds of nitrogen per acre, group B gets 40 pounds per acre, group C gets 60 pounds per acre, and group D gets 0 pounds per acre. Which of the following is the control group? Is it a positive or negative control group?

Accepted Answer

Group D; negative control group

Question 19

Which of the following options has the correct order in terms of the hierarchy of the organization?

Accepted Answer

Biosphere → Ecosystem → Community → Population → Organism.

Introduction to Biology: Scientific Method, Experimental Design, and Life's Organization

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