Question
How do plants recycle carbon during photosynthesis?(1 point)
Responses
The carbon in oxygen molecules is recycled during photosynthesis.
The carbon in oxygen molecules is recycled during photosynthesis.
The carbon in carbon dioxide is recycled during photosynthesis.
The carbon in carbon dioxide is recycled during photosynthesis.
The carbon in glucose is recycled during photosynthesis.
The carbon in glucose is recycled during photosynthesis.
The carbon in water is recycled during photosynthesis.
The carbon in water is recycled during photosynthesis.
9 answers
The correct answer is: The carbon in carbon dioxide is recycled during photosynthesis.
How do plants recycle hydrogen during cellular respiration?(1 point)
Responses
The hydrogen in water is recycled when glucose is formed.
The hydrogen in water is recycled when glucose is formed.
The hydrogen in glucose is recycled when hydrogen gas is formed.
The hydrogen in glucose is recycled when hydrogen gas is formed.
The hydrogen in glucose is recycled when water is formed.
The hydrogen in glucose is recycled when water is formed.
The hydrogen in hydrogen gas is recycled when glucose is formed.
Responses
The hydrogen in water is recycled when glucose is formed.
The hydrogen in water is recycled when glucose is formed.
The hydrogen in glucose is recycled when hydrogen gas is formed.
The hydrogen in glucose is recycled when hydrogen gas is formed.
The hydrogen in glucose is recycled when water is formed.
The hydrogen in glucose is recycled when water is formed.
The hydrogen in hydrogen gas is recycled when glucose is formed.
The correct answer is: The hydrogen in water is recycled when glucose is formed.
How many molecules of water are recycled when one molecule of glucose is created during photosynthesis?(1 point)
Responses
3
3
1
1
12
12
6
Responses
3
3
1
1
12
12
6
The correct answer is: 6
Scientists used radioactive hydrogen to make water. They grew plants using the radioactive water. What happened to the radioactive hydrogen during photosynthesis?(1 point)
Responses
It was recycled when water was formed.
It was recycled when water was formed.
It was recycled when light energy was formed.
It was recycled when light energy was formed.
It was recycled when hydrogen gas was formed.
It was recycled when hydrogen gas was formed.
It was recycled when glucose was formed.
Responses
It was recycled when water was formed.
It was recycled when water was formed.
It was recycled when light energy was formed.
It was recycled when light energy was formed.
It was recycled when hydrogen gas was formed.
It was recycled when hydrogen gas was formed.
It was recycled when glucose was formed.
The correct answer is: It was recycled when glucose was formed.
Scientists used radioactive hydrogen to make water. The scientists grew plants using the radioactive water. Based on their observations, they concluded that hydrogen is recycled during photosynthesis. Which observation provides evidence for this conclusion? (1 point)
Responses
Light in the plant’s leaves was radioactive.
Light in the plant’s leaves was radioactive.
Glucose in the plant’s stem was radioactive.
Glucose in the plant’s stem was radioactive.
Hydrogen gas in the surrounding air was radioactive.
Hydrogen gas in the surrounding air was radioactive.
Water vapor near the plant was radioactive.
Responses
Light in the plant’s leaves was radioactive.
Light in the plant’s leaves was radioactive.
Glucose in the plant’s stem was radioactive.
Glucose in the plant’s stem was radioactive.
Hydrogen gas in the surrounding air was radioactive.
Hydrogen gas in the surrounding air was radioactive.
Water vapor near the plant was radioactive.
The correct answer is: Glucose in the plant’s stem was radioactive.
9 answers