Where is the brain of a rotifer located?

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.

Describe the response the kidneys have to dehydration and excessive water intake. what happens to the concentration of urine in each case ?

Describe the relationship and movement between temperature and density in a convection cell. make sure you identify the direction of travel