In the structure of 1-methylbicyclo[4.3.0]nonane, identify the primary, secondary, tertiary, and quaternary carbons.

Which level of consumer had access to the smallest apply of energy

What did hunter gathers do to alter the environment?

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