Which of the following is the most likely reason for a population to decrease? there is less competition for same resource
the number of prey suddenly increases
the number of predators suddenly decreases
the number of predators suddenly increases

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 .

Approximately percent of the energy created by cell metabolism is used by the body to carry on its normal functions, such as respiration, digestion, reproduction, muscular movement, circulation, and cellular regrowth.

Which kind of worm has a closed circulatory system? a planarian b fluke c pinworm d an earthworm