Ascientist has analyzed the chemicals that make up a sample of an unknown substance. which chemicals would be the best indicator that the unknown substance is a plant

Which of the following systems in absorbing oxygen and releases carbon dioxide

Differences between compact bone and cartilage

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 .