Question 1

Question

A) Which term describes a product of photosynthesis? (1 point)
energy
glucose
water
carbon dioxide
Question 2
A) Which statement is true? (1 point)
Cellular respiration begins with the Krebs cycle in the cytoplasm.
Cellular respiration begins with the Krebs cycle in the mitochondria.
Cellular respiration begins with glycolysis in the mitochondria.
Cellular respiration begins with glycolysis in the cytoplasm.
Question 3
A) Scientists used radioactive hydrogen to make water. They grew plants using the radioactive
water. What happened to the radioactive hydrogen during cellular respiration? (1 point)
It was recycled into protein.
It was recycled into water.
It was recycled into glucose.
It was recycled into hydrogen gas
Question 9
A) Which statement is correct about the role of animal respiration in the carbon cycle?
(1 point)
Carbon dioxide is released into the atmosphere as a result of animal waste decay.
Carbon dioxide is released into the atmosphere as a result of animal metabolism.
Carbon dioxide moves through animals’ bodies and is immediately released back into the air.
Carbon dioxide is stored inside animals’ bodies and is released after they die.
Question 10
A) Nitrogen cycling is important for living organisms to survive because nitrogen (1 point)
is required to make DNA and proteins.
makes up most of Earth’s atmosphere.
is taken up by plant roots.
passes from producers to consumers.
Question 11
A) Animals obtain their nitrogen from (1 point)
bacteria.
plants.
nitrates.
nitrites

Question 4
A) How do plants recycle oxygen during photosynthesis? (1 point)
Glucose and water are recycled into carbon dioxide and oxygen gas.
Glucose and oxygen gas are recycled into carbon dioxide and water.
Carbon dioxide and water are recycled into glucose and oxygen gas.
Oxygen gas and water are recycled into glucose and carbon dioxide.
Question 5
A) A student uses ball-and-stick models of substances to show how carbon is recycled by
plants. Which statement is true about the model of the cycles? (1 point)
Only the compounds that contain carbon should be shown in the cycle.
The process of photosynthesis is always shown first in the cycle.
Either of the processes of cellular respiration or photosynthesis can be shown first because a
cycle has no start or finish.
The process of cellular respiration is always shown first in the cycle.
Question 6
A) If producers generate 100% of the energy, what percentage of that energy is left by the time
it reaches tertiary consumers? (1 point)
10%
100%
1%
0.1%
Question 7
A) Why is only 10% of energy transferred from one trophic level to the next? (1 point)
because energy is used up when consumers eat producers
because energy is lost to the environment as heat between levels
because energy is used for metabolism at each level
because producers need most of the energy for photosynthesis
Question 8
A) Which statement is correct about the movement of carbon in photosynthesis? (1 point)
Carbon dioxide moves through plants and is returned to the air.
Carbon atoms move from the air to plants, which use them to make proteins.
Carbon atoms move through plants and are returned to the air.
Carbon dioxide moves from the air to plants, which use it to make glucose.
Question 12
A) Which of the following can be classified as a decomposer? (1 point)
frog
fungus
owl
corn
Question 13
A) Select the most accurate example of a food chain. (1 point)
grass → rabbit → snake → hawk
rabbit → hawk → grass → snake
hawk → snake → rabbit → grass
snake → rabbit → grass → hawk

Answer 1

Here are the answers to the questions provided:

Question 1:
Answer: glucose

Question 2:
Answer: Cellular respiration begins with glycolysis in the cytoplasm.

Question 3:
Answer: It was recycled into water.

Question 9:
Answer: Carbon dioxide is released into the atmosphere as a result of animal metabolism.

Question 10:
Answer: is required to make DNA and proteins.

Question 11:
Answer: plants.

Question 4:
Answer: Carbon dioxide and water are recycled into glucose and oxygen gas.

Question 5:
Answer: Either of the processes of cellular respiration or photosynthesis can be shown first because a cycle has no start or finish.

Question 6:
Answer: 0.1%

Question 7:
Answer: because energy is lost to the environment as heat between levels.

Question 8:
Answer: Carbon dioxide moves from the air to plants, which use it to make glucose.

Question 12:
Answer: fungus

Question 13:
Answer: grass → rabbit → snake → hawk

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