Explain how the following terms are related to one another: dna, centromere, chromosome, chromatid

Name the plastid and pigment likely to be found in the cells of (a) petals of sunflower (b) ripe tomato.

What did hunter gathers do to alter the environment?

The leopard frog and the pickerel frog are two closely related species. in areas where their ranges overlap, the frogs will remain separate species if they