Answer:
C. At least five mass-extinction events have occurred during the last 500 million years.
Explanation:
- The history of mass extinct is related to the five mass extinctions that are caused over by the 350 million years n which many species have disappeared in there short geologic time.
- A massive extinction is caused in the Permian Triassic extinction event i.e about 250 mn years ago which on an estimate has killed 90% of the species.
- The Cretaceous–Paleogene extinction event that occurred over 66 million years ago is known to have wiped out the dinosaurs and many other species.
Answer:
Explanation:
For one cycle, two molecules of carbon, three molecules of NADH, one molecule of FADH2 and one molecule of ATP or GTP are produced. Each glucose molecule produces two molecules of acetyl CoA, enough for two cycles.
Elevated plasma aldolase is indicative of muscular dystrophy because this enzyme is present in the muscle cells thereby it is released to the bloodstream
<h3>What is muscular dystrophy?</h3>
Muscular dystrophy is a progressive degenerative where muscle cells are destroyed because they don't have a functional copy form of the dystrophin gene, and the aldolase enzyme is located within muscle cells.
In conclusion, elevated plasma aldolase is indicative of muscular dystrophy because this enzyme is present in the muscle cells thereby it is released to the bloodstream
Learn more about muscular dystrophy here:
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