Why do chromosomes in body cells exist in pairs? OA.
because chromosomes group together to fit into the small space of a cell
ОВ.
because each parent contributes one of each type of chromosome to its offspring
OC.
because chromosomes from one parent must remain separate from those of the other
OD.
because each chromosome is duplicated when an organism is born

B

Explanation:

Each chromosome comes from each parent during reproduction/sex

ecological efficiency: % of usable energy transferred as

biomass from one trophic level to the next typical is 10% efficient (90% of

energy is lost),is diagramed as the pyramid of energy flow. then osprey eagle

are tertiary consumer and the shrimp are primary consumer, so to balance

mass of shrimp (1/0.1) / 0.1 = 100 kg