The chemical process for respiration
a) releases adp.
b) releases energy.
c) releases oxygen.
d) releases glucose.

I’m doing some practice exam questions for biology, and i’m not sure how to do these 3 parts to the question.

Living cells cannot use heat to provide the activation energy for biochemical reactions because which choice(s) complete the sentence correctly? a) answer choice ii. eliminate b) answer choices ii and iv. c) answer choice iii and iv. d) all answers can complete the sentence.

How does photosynthesis show the conservation of mass and energy?