Answer:
I think it's
A <u>mass </u>extinction occurs when many species go extinct in a relatively short period of time.
Explanation:
Mass extinction is usually defined as a loss of about three-quarters of all species in existence across the entire Earth over a “short” geological period of time. Hence, I think the answer is correct.
Answer:
The depth (distance from top to bottom) of the atmosphere is greatest at sea level and decreases at higher altitudes. With greater depth of the atmosphere, more air is pressing down from above. Therefore, air pressure is greatest at sea level and falls with increasing altitude.
Explanation:
Your welcome<3
Got it from flexbooks.ck12.org
Answers:
1. <u>A) The chromosomes split apart at the centromere.</u>
2. <u>C) The chromosome pairs collect in a line across the middle of the cell.</u>
3. <u>B) anaphase</u>
4. <u>C) telophase I</u>
Answer:
products
Explanation: Substances present BEFORE a reaction occurs are described as reactants. Substances present AFTER a reaction has occurred are described as products