If 2000 kcal of energy would be available in grass, how much energy would be availabele to the cow that eats the grass? to the human that eats the cow?

Fan egg cell containing the (n+1) number of chromosomes combines with a sperm cell containing the (n) number of chromosomes, what is the result of this union? a) all future somatic cells of the organism will contain the (2n + 1) number of chromosomes. b) all future somatic cells of the organism will contain the (2n - 1) number of chromosomes. c) only certain somatic cells of the organism will contain the (2n + 1) number of chromosomes. d) all future somatic cells of the organism will contain the normal diploid number of chromosomes.

In what for do plants utilize nitrogen? why do they need nitrogen?

Which of the following is not a food produced in rainforests? a) coffee b) cocoa c) avocados d) wheat