Julie has red hair, while Billy has brown hair. Explain how differences in their chromosomes can account for this difference in appearance.

Use the drop-down menu to match the following definitions to the corresponding terms. the total variety of organisms that live in the biosphere a group of organisms that breed and produce offspring that can breed all of the biotic and abiotic factors in an area

What are the formed elements (cell or parts of cell) in blood and what are their functions ?

If people from georgia have just experienced an extremely cold winter the last couple of months, what would the climate most likely be classified as? polar temperate maritime tropical