in carbon dioxide in your tissues leads to in pH of cerebrospinal fluid and blood, which ultimately causes your breathing to speed up. View Available Hint(s) in carbon dioxide in your tissues leads to in pH of cerebrospinal fluid and blood, which ultimately causes your breathing to speed up. A decrease, a rise A decrease, a drop An increase, a drop Actually, it is the increase and decrease in oxygen, not carbon dioxide, that controls breathing. An increase, a rise

the answer is a or when it says crossing over

white blood cells or wbc s are mainly 2 types-

1.agranulocytes

2.granulocytes

the monocytes or macrophages of agranulocytes , dendritic cells which are accessory leucocytes, and b cells which is one type of lymphocytes   identify the antigens present on the pathogen's surface. these three cells are called antigen presenting cells(apc) which are phagocytes and destroy the antigens by secreting antitoxins. besides this leukocyte is always plays vital role in the immunity of the body.

•there must be variation for the particular trait within a population.

•the variation must be inheritable (that is, it must be capable of being passed on from the parents to their offspring).

•individuals with one version of the trait must produce more offspring than those with a different version of the trait.good

explanation:

the answer is c on e2020, bud.