What type of molecule is estrogen made of

Explanation: Estrogen are steroid hormones which are made up of special molecules with a four ringed carbon atom back bone. A series of chemical reaction occurs spurred by an enzyme which removes and add groups to cholesterol core. This action transforms it into pregnenolone and then into androgens, then special aromatase enzyme convert androgen into estrogen.

d. in sexual reproduction, offspring have more chromosomes than

either parent.

asexual reproduction results in offspring which are genetically the same as the parent organism (not counting a rare mutation). sexual reproduction produces a random mixture of the genetics derived from both parents

explanation:

the oxygenated blood then leaves the lungs through pulmonary veins, which return it to the left heart, completing the pulmonary cycle. this blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle. from the left ventricle, the blood passes through the aortic valve to the aorta.

deoxygenated blood leaves through the right ventricle through the pulmonary artery. from the right atrium, the blood is pumped through the tricuspid valve (or right atrioventricular valve), into the right ventricle.