What is the probability of heterozygous offspring between this cross: Ggrr x ggRR?

Name the organs of humanelemintary canal.

What is the most appropriate method of gaining weight (muscle mass)

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