Study graphs of planets

planet a is an planet.
a. outer
b. inner

planet b is an planet.
a. outer
b. inner

planet is
a. earth
b. jupiter
c. mars
d. uranus

planet b is
a. earth
b. jupiter
c. mars
d. uranus

the unequal cytoplasmic division that  results  in  one egg  and three polar bodies ensures that a fertilized  egg has  ample nutrients  forits journey  to  the uterus.

blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. as the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated.

occluded front i think

answerbacterium;