Which condition is caused by a trisomy of chromosome 21 ?

What does the hardy-weinberg principle relate to? a. chances of survival of an organism b. frequency of alleles in a population c. natural selection in a species d. causes of evolution among organisms

Plants consume most of their carbon from a. the soil b. the water c. the roots d. the air

The direct energy source that drives atp synthesis during respiratory oxidative phosphorylation is