« previous next »

Author Question: What is the prehistoric overkill hypothesis, and what evidence supports overkill as the reason for ... (Read 87 times)

vicotolentino

  • Hero Member
  • *****
  • Posts: 552
on: Jul 15, 2018

What is the prehistoric overkill hypothesis, and what evidence supports overkill as the reason for the
  Pleistocene extinctions? What is the alternative hypothesis? What will be an ideal response?



Question 2

What was the first line of evidence that the Cretaceous Mass Extinctions were caused predominantly
  by a large meteorite impact? What will be an ideal response?



Briannahope

  • Sr. Member
  • ****
  • Posts: 364
Reply #1 on: Jul 15, 2018
Answer to Question 1

The hypothesis states that human hunters were responsible for the extinctions. Extinctions occurred
mostly on North America and affected mostly large terrestrial mammals, whereas previous extinctions
affected many other kinds of organisms. The alterative is that rapid climate change at the end of the Ice
Age killed off the large mammals because they could not adapt to the warmer climate.



Answer to Question 2

An abnormally high concentration of iridium was discovered in a 2.5 cm-thick clay layer in Italy,
which was followed by many more discoveries of high iridium in rocks that age. Iridium is common in
some meteorites, and the high concentration could be explained by a large meteorite impact.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

The tallest man ever known was Robert Wadlow, an American, who reached the height of 8 feet 11 inches. He died at age 26 years from an infection caused by the immense weight of his body (491 pounds) and the stress on his leg bones and muscles.

Did you know?

Astigmatism is the most common vision problem. It may accompany nearsightedness or farsightedness. It is usually caused by an irregularly shaped cornea, but sometimes it is the result of an irregularly shaped lens. Either type can be corrected by eyeglasses, contact lenses, or refractive surgery.

Did you know?

For pediatric patients, intravenous fluids are the most commonly cited products involved in medication errors that are reported to the USP.

Did you know?

Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.

Did you know?

Atropine was named after the Greek goddess Atropos, the oldest and ugliest of the three sisters known as the Fates, who controlled the destiny of men.

Evidence of Water on Mars Evidence of Water on Mars
Evidence-based practice: skin assessment Evidence-based practice: skin assessment
Four kinds of evidence supporting the theory that species evolve. Four kinds of evidence supporting the theory that species evolve.
Give the world a reason to remember your name Give the world a reason to remember your name
A phylogenetic tree showing the evolutionary relationships among hominoids. The evidence shows that A phylogenetic tree showing the evolutionary relationships among hominoids. The evidence shows that
Experimental evidence of cytoplasmic localization in an amphibian oocyte. Experimental evidence of cytoplasmic localization in an amphibian oocyte.
Video: Smoking Cessation

For a complete list of videos, visit our video library