From a chemical view, how is an amino acid is being recognized by its specific aminoacyl tRNA synthetase? -with reference please.

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

Give examples of selective advantage of organism’s body part/organ

What happens to the average kinetic energy of water molecules as water freezes?