Match each lettered part of the diagram to its cell structure by writing its letter on the line provided.

The body is protected against harmful flu viruses by

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 .

Which feature of a human community is similar to a niche in a biological community