What is the function of the hormone progesterone? edge 2020 btw. A. preparation of the body for maintaining pregnancy
B. development of male secondary sex characteristics
C. development of female secondary sex characteristics
D. preparation of the fallopian tube for fertilization

it would lead to upper respiratory infections and pneumonia.

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.

it's diluted or concentrated

in a diluted solution, you can add a lot more solute but in concentrated only a little more can be added

they have identical fossils of organisms that have evolved over time.

both have animal fossils preserved in them due to weathering and erosion.

they contain different fossils because life on earth has changed through time.

the fossils in them were formed on the surface of earth due to exposure to sunlight.