Full of oxygen, a blood cell leaves the left ventricle through a major artery known as the This artery branches and becomes smaller as it extends away from the heart. The blood cell continues through the arterioles and into the These are the smallest blood vessels and the site of gas exchange between the blood and the body tissues. The blood cell then travels back to the heart through It reaches the largest vein, where all blood returns, known as the Cava. It then enters the heart's right travels through a valve into the right and is pumped through the artery to the Here it can release carbon dioxide and pick up oxygen in another round of gas exchange. The blood cell returns to the heart through the vein and enters the left It travels through a valve into the left ventricle to begin the cycle again.​

answer; i believe the correct answer is (data); /// good luck

the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.

the answer is sex-linked recessive.

if the hares very faster than they are now, and thus the lynx's hunting success rate drops because it will be harder to catch them, the rate that will change will be the pray-rate. the pray-rate will change because more hares will be able to survive, thus more individuals for reproduction, so the end result will be increasing population of hares.

the predator-rate will remain pretty much the same because there will be more than enough pray, but the hunting success rate is stagnant.