The nitrogen in the air cannot be used by producers and consumers. It must be fixed or converted by bacteria in the ground into a useable form for plants called nitrates. Some plants called legumes (beans and clover) actually have bacteria in their roots.
Answer:
one of two or more alternative forms of a gene that arise by mutation and are found at the same place on a chromosome.
(B)
Explanation:
Answer:
Explanation:
Glucose is the thing needed to start the kreb cycle. A glucose molocule if produced after a plant finishes photosynthesis. Glucose is used to power the kreb cycle and helps the plant be able to produce a half of oxygen.
Each male and female sex cell has 46 chromosomes in it. The number of chromosomes are reduced to half(23), so that when the sex cells combine, they also add up to 46(23+23). If the chromosomes did not reduce to half, the number of chromosomes would be off balance and the gamete would not survive.
