Semester 1 Test Biology

What variable is purposely changed in an experiment?

• Independent variable
• Dependent variable
• Control
• Qualitative variable

What is the name of the group that receives no changes in an experiment?

• The variable group
• Control group
• Test group
• Experimental group

In the picture shown here, the type of plant, fertilizer, and number of lights are all kept the same. What word describes variables that are the same in all of the groups?

• Constants
• Dependent variables
• Independent variables
• Experimental groups

In the picture shown here, the amount of water each plant receives is changed to see how it affects plant height. The height of the plant is being measured and depends on how much water is given. The height of the plant would be which variable?

• Independent variable
• Dependent variable
• Control group
• Experimental group

What word means the body trying to keep conditions stable or normal? Example: Sweating when you are too hot or shivering when you are cold helps keep your body temperature stable.

• Thermostatic control
• Mitosis
• Control abilities
• Homeostasis

Which of the following organisms is an example of a producer?

• Cow
• Frog
• Snake
• Grass

How much energy is transferred between each trophic level?

• 100%
• 60%
• 10%
• 5%

Which of the following is an example of an biotic factor in an ecosystem?

• Bird
• Soil
• Water
• Atmosphere

Rabbits main predators are hawks. If the hawk population increases, what would you expect to happen to the rabbit population?

• It would stay the same
• It would decline
• It would increase
• There is not enough information to answer the question.

What happens to the majority of the energy obtained from food?

• Released as heat

• Used to make ATP
• Turns into fat/muscle
• Disappears into nothing