Blood clotting requires 12 clotting factors and calcium ions (Ca2+) to ensure that plasma and the formed elements leave the blood vessels.
Answer the following statement true (T) or false (F)
False
Blood clotting requires 13 clotting factors and calcium ions (Ca2+) to ensure that plasma and the formed elements remain in the blood vessels.
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One widely used cladistic method of examining evolutionary relationships is ________, which is based on the assumption that evolution is most likely to have proceeded by the path requiring fewest changes
A) topology B) neighbor joining C) parsimony D) systematics
How does it relate to the question?
What will be an ideal response?
A confused frog deposits its sperm onto a toad's eggs as they are being laid. No offspring develop because the frog's sperm are unable to penetrate the toad's egg. This is an example of
A. mechanical isolation. B. temporal isolation. C. habitat isolation. D. behavioral isolation. E. gametic isolation.
A community in which many species are involved in a food web is ____
a. more fragile since organisms have more than a single food source b. more fragile since organisms have only a single food source c. more stable since organisms have more than a single food source d. more stable since organisms have only a single food source e. most prone to damage from human interference