Why is carbon dioxide considered a greenhouse gas? it is released when fossil fuels are burned. it is part of the carbon cycle, which is also known as the greenhouse cycle. it can absorb infrared radiation. it is responsible for protecting organisms from uv radiation.

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 .