Answer:
Endocrine system uses chemical signaling (hormones produced by glands) while the nervous system uses electrical signaling (neural impulses).
All of these are not part of the life cycle. It's man-made. Think of it in biology terms - something that's created genetically.
Photosynthesis is used by plants to crest food. This is essential to all life because of the oxygen plants give off in the process, and the food source the plant becomes.
The answer is D. Increasing government funding of research
Rust I think that's what it is
