Question

1. what is the ultimate source of energy for most living organisms?
2. in order to have atp to use for everyday processes plants must

a. do photosynthesis
b. do cellular respiration
c. do both photosynthesis and cellular respiration
d. do neither process, they get their energy from the sun

Explanation:

• Question 6: The sun is the ultimate energy source. Through photosynthesis, plants convert solar energy into chemical energy (glucose). Other organisms consume plants (or plant - eating organisms) to obtain this energy.
• Question 7:
• Option A: Photosynthesis produces glucose and oxygen. While it is the initial step in energy capture for plants, it does not directly produce ATP for immediate use in most cellular processes.
• Option B: Cellular respiration breaks down glucose (produced by photosynthesis) to produce ATP. But without photosynthesis, there would be no glucose (in the long - term for plants) to break down.
• Option C: Plants first do photosynthesis to make glucose (energy - storing molecule) and then do cellular respiration to break down glucose and produce ATP for everyday processes like active transport, growth, etc.
• Option D: Plants need to process the solar energy (through photosynthesis to make glucose and then cellular respiration to make ATP). Just getting energy from the sun is not sufficient for ATP production for most cellular functions.

Answer:

1. The sun.
2. C. Do both photosynthesis and cellular respiration.