In which organism shown on the opposite page are cells organized into tissues? Explain your answer.

When analyzing tree rings, what do scientists assume a thin ring indicates?

For this question look at the hydropic diagram water that is heated by the sun evaporates. select the number that represents it.

Agene pool: a) is the collection of all the alleles found in a single species b) is the collection of all the alleles found in a single population c) is the collection of all the chromosomes found in a single population d) is the collection of genes in a species that allow the individuals to swim