« previous next »

Author Question: There have been at least how many mass extinctions over the course of 570 million years? a. 15 ... (Read 71 times)

tiara099

  • Hero Member
  • *****
  • Posts: 588
on: Jul 10, 2018
There have been at least how many mass extinctions over the course of 570 million years?
 
  a. 15
  b. 2
  c. 7
  d. 20
  e. 12

Question 2

According to biologist Stephen Palumbi (2001), humans are the world's
 
  a. greatest creation.
  b. weakest evolutionary force.
  c. greatest evolutionary force.
  d. greatest devolutionary force.
  e. greatest threat.


bdobbins

  • Sr. Member
  • ****
  • Posts: 326
Reply #1 on: Jul 10, 2018
Answer to Question 1

a

Answer to Question 2

c


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

tiara099

  • Hero Member
  • *****
  • Posts: 588
Reply #2 on: Jul 10, 2018
Correct answers!


bdobbins

  • Sr. Member
  • ****
  • Posts: 326
Reply #3 on: Jul 10, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

Liver spots have nothing whatsoever to do with the liver. They are a type of freckles commonly seen in older adults who have been out in the sun without sufficient sunscreen.

Did you know?

Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.

Did you know?

According to the American College of Allergy, Asthma & Immunology, more than 50 million Americans have some kind of food allergy. Food allergies affect between 4 and 6% of children, and 4% of adults, according to the CDC. The most common food allergies include shellfish, peanuts, walnuts, fish, eggs, milk, and soy.

Did you know?

Parkinson's disease is both chronic and progressive. This means that it persists over a long period of time and that its symptoms grow worse over time.

Did you know?

Although not all of the following muscle groups are commonly used, intramuscular injections may be given into the abdominals, biceps, calves, deltoids, gluteals, laterals, pectorals, quadriceps, trapezoids, and triceps.

Exponential growth in the Canadian migratory population of the whooping crane after 70 years of cons Exponential growth in the Canadian migratory population of the whooping crane after 70 years of cons
(a) The site of Zhoukoudian outside of Beijing, China, spans several hundred thousand years and (b) (a) The site of Zhoukoudian outside of Beijing, China, spans several hundred thousand years and (b)
Adolescence: 12 years or puberty to the beginning of adulthood. Adolescence: 12 years or puberty to the beginning of adulthood.
Percentage of youth age 15 to 19 years with at-risk levels of body composition & fitness Percentage of youth age 15 to 19 years with at-risk levels of body composition & fitness
A pedigree for albinism collected in the early years of the twentieth century by Charles Davenport, A pedigree for albinism collected in the early years of the twentieth century by Charles Davenport,
What amount was invested 35 years ago at 7% compounded semiannually if the value of the ... What amount was invested 35 years ago at 7% compounded semiannually if the value of the ...
Video: The Vestibular System

For a complete list of videos, visit our video library