There is a large number of mitochondria in cardiac muscle cells because cardiac muscles need the mitochondria to: 1)work harder and longer.
2)maintain their shape.
3)maintain their color.
4)be attached to the ribs.

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 .

2. which is the last step in the scientific method?

Describe characteristics of a good respitory surface