« previous next »

Author Question: What is the prehistoric overkill hypothesis, and what evidence supports overkill as the reason for ... (Read 120 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?

Patients who cannot swallow may receive nutrition via a parenteral route—usually, a catheter is inserted through the chest into a large vein going into the heart.

Did you know?

The newest statin drug, rosuvastatin, has been called a superstatin because it appears to reduce LDL cholesterol to a greater degree than the other approved statin drugs.

Did you know?

In 1835 it was discovered that a disease of silkworms known as muscardine could be transferred from one silkworm to another, and was caused by a fungus.

Did you know?

No drugs are available to relieve parathyroid disease. Parathyroid disease is caused by a parathyroid tumor, and it needs to be removed by surgery.

Did you know?

Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.

Evidence that the ATP synthase is a rotary machine Evidence that the ATP synthase is a rotary machine
Anatomically modern humans left archaeological clues, including evidence of burials, which indicate Anatomically modern humans left archaeological clues, including evidence of burials, which indicate
Common skin signs are often evidence of an illness or disorder. A wheal is a localized, evanescent ... Common skin signs are often evidence of an illness or disorder. A wheal is a localized, evanescent ...
Common skin signs are often evidence of an illness or disorder. A crust is a dry, serous or ... Common skin signs are often evidence of an illness or disorder. A crust is a dry, serous or ...
Experimental evidence of cytoplasmic localization in an amphibian oocyte. Experimental evidence of cytoplasmic localization in an amphibian oocyte.
One hypothesis for the evolution of the eukaryotes One hypothesis for the evolution of the eukaryotes
Video: Protein Secondary and Tertiary Structures - Animation

For a complete list of videos, visit our video library