9. Photosynthesis

Why would a plant close its stomata?

Which process is primarily responsible for producing the oxygen present in Earth's atmosphere?

How do animals obtain carbon for their metabolic processes?

How do scientists explain the increase in oxygen in Earth's early atmosphere?

How does photosynthesis indirectly provide energy for birds?

The closest algal relatives of land plants are _____.

Where do plants obtain the energy required to synthesize organic molecules during photosynthesis?

Which statement describes the role of phloem within a plant?

Which of the following types of organisms contain chloroplasts to help with food production?

Which component of Earth's atmosphere is decreased as a direct result of photosynthesis?

Which of the following are the main reactants required for the process of photosynthesis in plants?

Which of the following types of organisms produces nearly all of the biosphere's food supply?

Which two trends are commonly observed in modern monthly atmospheric CO\(_2\) concentration charts?

Which of the following best describes photosynthesis?

If \(^{14}\)C-labeled uracil is added to the growth medium of cells, which macromolecules will become labeled?