Most land mammals have the ability to rest one hemisphere of their brains at a time. t or f

The answer is False.

The ability to rest one hemisphere of their brains at a time is a phenomenon called unihemispheric sleep. It is not common for the most land mammals. It was observed in some reptiles, birds (for example domestic, chicken), and aquatic mammals (dolphins, seals,...). This phenomenon enabled sleeping animals to receive stimuli all the time. For example, in the case of emergency, animal will receive stimuli to fly away. For aquatic mammals, it is important to emerge to the water surface to breathe while sleeping.

Six amino acids have side chains that are polar but not charged. these are serine (ser), threonine (thr), cysteine (cys), asparagine (asn), glutamine (gln), and tyrosine (tyr). these amino acids are usually found at the surface of proteins, as discussed in the proteins 2 module.