The left side of the heart receives oxygenated blood from the pulmonary vein and pumps it into the aorta, while the right side of the heart receives deoxygenated blood from the vena cava and pumps it into the pulmonary vein. The pulmonary vein and aorta also have valves connecting them to their respective ventricle.
A<em> fish ladder</em> is also known as fish steps, fish pass or fishway.
It is built around waterfalls, dams and locks.
The purpose of building a fish ladder is to<em> facilitate the natural migration of diadromous fishes.</em>
A fish ladder helps the fish to pass through the barriers by leaping up or swimming through the low steps of the ladder and reach into the water on the other side.
Since, without the fish ladder the barriers will not allow the migration of fishes, it is essential to be built around the dams, waterfalls and locks.
The most likely observed group composition of Primates is - Multi male.
Explanation:
Primates belong to an order of mammals. They have large brains, complex behavior and they can use hands. E.g, humans, apes, monkeys, chimpanzees, gorilla, lemur, baboon, and orangutan.
Sexual body size dimorphism means there is a difference in size between the two sexes. Mostly measured by the ratio of male and female body weight, body size. It also includes their mating system.
