Photosynthesis in Plants Answers

Which of the following is not necessary for a plant to carry out photosynthesis?a.carbon dioxideb.waterc.oxygend.sunlight

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

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

How does the carbon dioxide necessary for photosynthesis enter plants?a.through their rootsb.through openings in the leaves called stomatac.the plants produce their own complete supplyd.none of the above

Carbon fixation occurs during the light reactions.

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

Photosynthesis is vital for maintaining levels of atmospheric oxygen.

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.

C4 and CAM plants are _______.a.adaptations to arid environmentsb.adaptations to moist environmentsc.more common than C3 plantsd.less efficient at water conservation than C3 plants

How is the process of carbon fixation in CAM plants different from the process in C3 and C4 plants?a.CAM plants require a larger exchange of gases in the atmosphere than C3 and C4 plants.b.CAM plants are better adapted for moist, low light areas than C3 and C4 plants.c.CAM plants conserve water by allowing transpiration to occur at night rather than the day like it does with C3 and C4 plants.d.All of the above