Question

Which of the following statements about the dark reactions is true?
a. Dark reactions occur in the thylakoids of chloroplasts.
b. Light energy is converted to chemical energy during the dark reactions.
c. Carbon dioxide is converted to sugar using ATP and NADPH during the dark reactions.
d. All of the above

Answer 1

Photosynthesis is vital for maintaining levels of atmospheric oxygen
True/false

How are the dark reactions that occur in plants dependent on the light reactions?
a. The chemical energy used in the dark reactions is produced in the light reactions.
b. The light reactions produce the oxygen necessary for the dark reactions to proceed.
c. Light energy absorbed during the light reactions is used directly in the dark reactions.
d. During the light reactions, carbon dioxide is converted to sugars, which are used during the dark reactions.

Which of the following is not necessary for a plant to carry out photosynthesis?
a. carbon dioxide
b. water
c. oxygen
d. sunlight

Photosynthesis occurs when _______.
a. plants absorb energy from carbon dioxide
b. plants absorb energy from sunlight
c. oxygen concentration in the atmosphere increases
d. all of the above

Which of the following types of carbon fixation is least common for plants in arid locations?
a. C3
b. C4
c. CAM
d. none of the above

Different types of plants use different types of carbon fixation as adaptations to varying conditions.
True/false

Which of the following plant structures provides most of the water necessary for photosynthesis?
a. roots
b. leaves
c. chloroplasts
d. stomata
Why is photosynthesis vital for life?
a. Photosynthesis helps maintain atmospheric levels of oxygen and carbon dioxide.
b. Photosynthesis is a direct means of energy production for many organisms.
c. Photosynthesis is an indirect means of energy production for many organisms.
d. All of the above

What is the main difference between C3 and C4 carbon fixation?
a. In C3 carbon fixation, plant stomata are open during the day, while they are open at night for C4 carbon fixation.
b. C3 processes take place throughout the leaf, while C4 processes take place in the inner cells.
c. C3 carbon fixation is more common in areas with high light intensity than C4 carbon fixation.
d. C3 processes are more efficient than C4 processes in high temperatures.

Answer 2

um, ok, please don't ask 20 questions in one question

Answer 3

its not 20 its 10 n if you are not going to help why comment