B second year. The number of tree rings can tell how old a tree is, but the thickness of those rings also says something about the amount of water available in a given year. Wider rings mean the tree received more water that year. Thinner rings mean water was scarce.
Answer:
stroke volume. ... If the right ventricle begins to pump an increased amount of blood, this soon arrives at the left ventricle, stretches it more than before, and causes it to increase its stroke volume and match that of the right.
Explanation:
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Internal fertilization, essential for terrestrial animal species because it allows the male and female gametes to come into contact
Industrial pollution is density-independent
habitat is density-dependent
food is also density-dependent because its availability varies depending on this factor
a hurricane is abiotic and density-independent
number of mates is density-dependent and hunting by humans is density-independent
