Question: Which of the following are typically or always heterotrophs?

Answer: Animals and Fungi

Question: The guard cells surrounding each stoma close the stomata periodically to

Answer: prevent water loss

Question: In a photosystem, antenna pigments capture photon energy and funnel it to the ____________ _________________, which consists of a pair of chlorophyll a molecules that actually use the light energy in photosynthetic reactions.

Answer: Reaction center

Question:

Answer: 1. The enzyme rubisco combines carbon dioxide with RuBP to form a 6-carbon unstable molecule.

2. The 6-carbon molecule splits to form PGA.

3. PGA is converted into PGAL.

4. Some PGAL is converted into glucose and other sugars, and some PGAL is converted back to RuBP.

Question: How does life depend on photosynthesis? Select all that apply.

Answer: Provides food for hetertrophs that eat photosynthesizers, incorporates atmospheric CO2 into organic compunds, provides food for photosynthesizers, and produces oxygen essential to many forms of life.