Together, respiration and photosynthesis keep the levels of carbon dioxide and oxygen in the atmosphere .

Surrounded by microtubules, located near the nucleus. (don't try to google it) (give answer only if u know)

In guinea pigs, black fur (b) is dominant over white fur (b). cross a heterozygous (hybrid) black guinea pig with a homozygous (purebred) white guinea pig. complete a punnett square, identify the genotype(s), phenotype(s), and probability (% and fraction) that the offspring will be black and white?

Why are human population trends difficult to predict?