Specialized structures that recognize neurotransmitter molecules and, when activated, may cause a change in the electrical activity of the neuron, are called

Acertain species of fish can have either long or short fins. the allele for long fins is dominant over the allele for short fins. a heterozygous, long-finned fish is crossed with a homozygous, short-finned fish. of the offspring, will have long fins and be , and will have short fins and be .

Organisms that successfully adapt will leave to grownone of the above

During convection, less dense fluid rises and denser fluid sinks.