Is the Earth round or flat

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

How would you expect the mrna codons that code for the amino acids that make up hemoglobin to compare between humans

Why were the results whit just water so much different than the trials with the detergent ?