An energy-rich organic compound needed by organisms is 1.
water
2.
salt
3.
oxygen
4.
glucose

The nervous system interacts with the endocrine system by a. using hormones as connections b. sending nerve impulses directly to glands c. using neuroendocrine cells as connections d. sending neurotransmitters directly to neurons

2. sketch the inside of the bean nodule, and describe or label what you observed with the hand lens.

How does secondary succession differ from primary succession?