The correct response is: The carbon in carbon dioxide is recycled during photosynthesis.
During photosynthesis, plants take in carbon dioxide from the atmosphere and convert it into glucose and oxygen, effectively recycling carbon in the process.
How do plants recycle carbon during photosynthesis?(1 point)
Responses
The carbon in glucose is recycled during photosynthesis.
The carbon in glucose is recycled during photosynthesis.
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 water is recycled during photosynthesis.
9 answers
How do plants recycle hydrogen during cellular respiration?(1 point)
Responses
The hydrogen in hydrogen gas is recycled when glucose is formed.
The hydrogen in hydrogen gas 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 water is recycled when glucose is formed.
The hydrogen in water is recycled when glucose is formed.
The hydrogen in glucose is recycled when water is formed.
Responses
The hydrogen in hydrogen gas is recycled when glucose is formed.
The hydrogen in hydrogen gas 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 water is recycled when glucose is formed.
The hydrogen in water is recycled when glucose is formed.
The hydrogen in glucose is recycled when water is formed.
The correct response is: The hydrogen in glucose is recycled when water is formed.
During cellular respiration, glucose is broken down, and the hydrogen atoms from glucose are ultimately used to form water.
How many molecules of water are recycled when one molecule of glucose is created during photosynthesis?(1 point)
Responses
6
6
12
12
3
3
1
Responses
6
6
12
12
3
3
1
The correct response is: 6.
During photosynthesis, six molecules of water are used in the chemical reaction that produces one molecule of glucose, along with six molecules of carbon dioxide.
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 light energy was formed.
It was recycled when light energy was formed.
It was recycled when water was formed.
It was recycled when water was formed.
It was recycled when glucose was formed.
It was recycled when glucose was formed.
It was recycled when hydrogen gas was formed.
Responses
It was recycled when light energy was formed.
It was recycled when light energy was formed.
It was recycled when water was formed.
It was recycled when water was formed.
It was recycled when glucose was formed.
It was recycled when glucose was formed.
It was recycled when hydrogen gas was formed.
The correct response is: It was recycled when glucose was formed.
During photosynthesis, the radioactive hydrogen from the water is incorporated into glucose, effectively recycling the hydrogen atoms in the process.
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
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.
Light in the plant’s leaves was radioactive.
Light in the plant’s leaves was radioactive.
Water vapor near the plant was radioactive
Responses
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.
Light in the plant’s leaves was radioactive.
Light in the plant’s leaves was radioactive.
Water vapor near the plant was radioactive
The correct response is: Glucose in the plant’s stem was radioactive.
This observation provides evidence that the radioactive hydrogen from the water was incorporated into the glucose during photosynthesis, indicating that hydrogen is recycled in this process.
9 answers