The human reproductive system is regulated by the endocrine system.
C. It is made of 11 atoms and 3 elements
It is the variable being controlled/changed to see if there are any effects on the dependent variable (the thing getting tested/measured)
They would have offspring with the alleles of TT
It would be impossible for they to have children with any recessive alleles because they both have dominant genes.
So D is the answer
Because seasons<span> are caused by the changing angles that sunlight strikes the Earth (due to it's </span>tilted<span> axis), a decrease in </span>tilt would<span> mean </span>less<span> extreme </span>seasons<span>. Spring and fall are not affected by </span>tilt<span> because they are at the point in orbit where sunlight is hitting the earth evenly</span>
