If an individual's respiratory rate decreases, then blood CO 2 levels:

a. rise, blood H+ levels rise, and blood pH rises.
b. rise, blood H+ levels rise, and blood pH falls.
c. rise, blood H+ levels fall, and blood pH falls.
d. fall, blood H+ levels rise, and blood pH rises.
e. fall, blood H+ levels fall, and blood pH falls.

Two male mice, which we will call male a and male b, are both phenotypically normal. male a was from a litter that contained half phenotypically normal mice and half dwarf mice. the mother of male a was known to be homozygous for the normal igf2 allele. male b was from a litter of eight mice that were all phenotypically normal. the parents of male b were a phenotypically normal male and a dwarf female. male a and male b were put into a cage with two female mice that we will call female a and female b. female a is a dwarf and female b is phenotypically normal. the parents of these two females were unknown, although it was known that they were from the same litter. the mice were allowed to mate with each other, and the following data were obtained: female a gave birth to three dwarf babies and four normal babies. female b gave birth to four normal babies and two dwarf babies. which male(s)mated with female a and female b? male a with both females male a with female b, and male b with female a male a with female a, and male b with female b could not be determined male b with both females

What initially causes a nerve impulse? release of enzymes out of the neuron movement of chemicals into the dendrites of the neuron pathogens attacking the dendrites of the neuron red blood cells bathing the neuron

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?