After holding our breath briefly, what eventually forces us to take a breath? decreasing oxygen levels. increasing oxygen levels. decreasing carbon dioxide levels. increasing carbon dioxide levels. increasing blood ph.

How do cells grow and reproduce to maintain homeostasis?

Which description provides the best objective summary of the article in the passage?

Cattle with brown fur and cattle with white fur will produce a reddish roan calf . when examined closely, the calf show about an even number of brown hairs and white hairs that give a reddish appearance when viewed from far away. the fact that both the brown fur allele and the white fur allele are expressed equally in the offspring is an example of