Answer: More than 99 percent of all organisms that have ever lived on Earth are extinct. As new species evolve to fit ever changing ecological niches, older species fade away. But the rate of extinction is far from constant. At least a handful of times in the last 500 million years, 75 to more than 90 percent of all species on Earth have disappeared in a geological blink of an eye in catastrophes we call mass extinctions.
Though mass extinctions are deadly events, they open up the planet for new forms of life to emerge. The most studied mass extinction, which marked the boundary between the Cretaceous and Paleogene periods about 66 million years ago, killed off the nonavian dinosaurs and made room for mammals and birds to rapidly diversify
C.there is no relationship between metabolic rate and body temperature.
The answer, I believe, is all of the above.
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That is a subduction or convergent boundary that can form volcanoes when two plates collide against each other.
The hypothalamus in the brain contributes to the body's maintenance of a steady internal physiological state, called homeostasis.
