Chromatids form when DNA replicates prior to cell division.
True or false

Which organelle breaks down sugar molecules that supply energy to the cell ?

Which kind of worm has a closed circulatory system? a planarian b fluke c pinworm d an earthworm

The frequency of alleles in a population that is in hardy weinberg equilibrium? a . changes in each successive generation b. is less important than the frequency genotypes c. shows evidence of the process of natural selection d. remains the same over several generations