Unit 1 - Experimental Design and Ecology

Explain the concept of a control group in experimental design.

• A control group is a group that receives a higher dosage of the experimental treatment or intervention.

• A control group is a group that receives a placebo instead of the experimental treatment or intervention.

• A control group is a group that does not receive the experimental treatment or intervention.

• A control group is a group that receives the experimental treatment or intervention after the other groups have completed the study.

List and describe the characteristics of life.

• The characteristics of life are: organization, metabolism, growth and development, response to stimuli, reproduction, homeostasis, and evolution.

• The characteristics of life are: structure, energy consumption, aging, reaction to environment, procreation, stability, and mutation.

• The characteristics of life are: arrangement, digestion, maturation, reaction to surroundings, breeding, equilibrium, and variation.

• The characteristics of life are: organization, metabolism, growth and development, response to stimuli, reproduction, homeostasis, and adaptation.

Provide an example of a control group design in a biology experiment.

• A control group design in a biology experiment involves having a group of subjects that are not exposed to the experimental treatment or intervention.

• A control group design in a biology experiment involves having a group of subjects that are exposed to a different treatment or intervention.

• A control group design in a biology experiment involves having a group of subjects that are exposed to the experimental treatment or intervention at a different time.

• A control group design in a biology experiment involves having a group of subjects that are exposed to a lower dosage of the experimental treatment or intervention.

What is the different between a scientific theory and a scientific law?

• Scientific laws are well-supported explanations that include related facts, laws, and verified hypothesis.

• Scientific theories are well-supported explanations that include related facts, laws, and verified hypothesis.

• Scientific laws explain why certain things happen the way they do.

• Scientific theories include observations of what happens in phenomena under certain conditions.

A student wants to know if the growth of bacteria changes due to the temperature of its environment. What is the independent variable in this experiment?

• The growth of the bacteria

• The temperature of the environment

• The type of bacteria used

• How long the bacteria grows

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A student wants to know if the growth of bacteria changes due to the temperature of its environment. What is the dependent variable in this experiment?

• The growth of the bacteria

• The temperature of the environment

• The type of bacteria used

• How long the bacteria grows

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NGSS.MS-LS1-5

Which is an example of a parasitic relationship?

• a bee pollinates a flower
• a tapeworm takes nutrients from a dog
• an orchid lives in a tree but does not harm the tree

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An organism that needs to eat other organisms to obtain energy is known as a:

• Autotroph
• Producer
• Consumer
• Mutualist

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A collection of organisms that make up a community as well as all of the nonliving aspects of the environment.

• Population
• Community
• Habitat
• Ecosystem

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What happens when different species try to occupy the same niche?

• The species compete with each other

• The species cooperate with each other

• The species coexist with each other

• All of the above

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