Sixty-five million years ago, more than three-fourths of all plant and animal species living on Earth becameextinct<span>. This event is known as the </span>K-T<span> mass </span>extinctionbecause it occurred at the boundary between theCretaceous<span> (K) and Tertiary (T) time periods. The most famous group of animals to perish was the dinosaurs.

Hope this helps :)</span>

8 0

3 years ago

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Which of the following mutations is evolutionarily important?

kompoz [17]

A gene in an egg cell inserts two extra base pairs!!

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3 years ago

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Following a meal glucose must move from the gut lumen where there is a high glucose concentration into the intestinal cell where

Alchen [17]

This movement from a high concentration area to a low concentration are is called Active transport.

<h3>Active Transport</h3>

Active transport by definition is a process that is characterized by the movement of molecules against a concentration gradient. Additionally, this process requires energy.

As in the question above, glucose molecules have to be moved across the gut lumen of higher glucose concentration to the intestinal cells of relatively low level of glucose.