49) Plants respond to their environment in many different ways. Design an experiment to
test the effects of one environmental factor, chosen from the list below, on plant growth.
Acidity of precipitation
Temperature
Amount of water
In your answer, be sure to:
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identify the environmental factor you chose
state one hypothesis the experiment would test
state how the control group would be treated differently from the experimental group
state two factors that must be kept the same in both the experimental and control
groups
identify the independent variable in the experiment
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label the columns on the data table below for the collection of data in your experiment
Correct Answer:
- Acid rain will cause a decrease in the number of seeds that germinate.
Note: Do not allow credit for a hypothesis written in the form of a question.
- The control group would be watered with water at pH 7, while the experimental groups
would be watered with water at pH less than 7.
50) Base your answer to question on the diagram below and on your knowledge of biology.
In a cell, a variety of structures perform specific functions and interact to maintain
homeostasis. The diagram below represents a typical cell with three cell structures labeled 1,
2, and 3.
Select one cell structure labeled in the diagram and write its number in the space below.
Explain how the cell structure you selected helps maintain homeostasis in a cell.
In your answer, be sure to:
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identify the cell structure you selected
state one function of this cell structure
identify one substance that is often associated with the cell structure you selected and
state how that substance is associated with the cell structure
identify one other cell structure and explain how it interacts with the cell structure you
selected to maintain homeostasis in the cell
Correct Answer:
Structure 1
• ribosome • site of protein synthesis • amino acid — used to make proteins • nucleus — the
ribosome gets instructions from the nucleus determining which proteins are produced by the
cell
Structure 2
• nucleus • control of cell processes • DNA — makes up the chromosomes in the nucleus
• ribosome — nucleus sends instructions to ribosomes for protein synthesis
Structure 3
• mitochondrion • site of energy release/cell respiration • ATP — produced in the
mitochondrion
• cell membrane — allows glucose to enter cell and be used by the mitochondrion for
energy release