Answers26-27 - C - RUSD Biology in the Living EarthPhotosynthesis and Respiration

Photosynthesis and Respiration — Test Answers

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21
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A scientist is conducting an investigation that involves water, silver, carbon dioxide, and oxygen gas. Which group of statements best describe all of the materials he is using in the investigation?

A
They are each made of matter. Some are compounds made of one type of element. Some are pure atoms.
B
They are all elements. Some contain molecules of the same type of atom. Some contain different types of atoms.
C
They are each made of matter. Some are compounds and some are elements. They all contain atoms.
D
They are each compounds. Each of the compounds is made of atoms. All of the atoms are made of matter.
22
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Which statement best describes the relationship between activation energy and rate of reaction?

A
Reducing the activation energy can increase the rate of a reaction.
B
Reducing the activation energy can decrease the rate of a reaction.
C
Increasing the reaction energy does not alter the rate of reaction.
D
Increasing the activation energy can increase the rate of a reaction.
23

Which conclusion is supported by the graph?

A
The 160-pound person burns about twice as many calories jogging as she does walking.
B
The 160-pound person burns about 50 calories per mile while jogging.
C
The 200-pound person burns more calories per hour doing aerobics than doing any other exercise shown.
D
The 200-pound person would need to play volleyball for three hours to burn the same number of calories as he burns in one hour of basketball.
24

Which option would allow Stella to set up a control group for the experiment?

A
She should give the plants receiving the least cap c cap o sub 2 a little more oxygen to compensate for the difference in gases.
B
She should give all the flowers the same amount of water.
C
She should place one flower in a similar container, but not pump carbon dioxide into it.
D
She should provide mist to each of the plants except one plant to keep the air moist and fertilize the plants.
25

Which type of lipid is shown?

A
an unsaturated triglyceride
B
a saturated phospholipid
C
an unsaturated phospholipid
D
a saturated triglyceride

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