« previous next »

Author Question: There have been at least how many mass extinctions over the course of 570 million years? a. 15 ... (Read 98 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?

Bisphosphonates were first developed in the nineteenth century. They were first investigated for use in disorders of bone metabolism in the 1960s. They are now used clinically for the treatment of osteoporosis, Paget's disease, bone metastasis, multiple myeloma, and other conditions that feature bone fragility.

Did you know?

Stroke kills people from all ethnic backgrounds, but the people at highest risk for fatal strokes are: black men, black women, Asian men, white men, and white women.

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?

The cure for trichomoniasis is easy as long as the patient does not drink alcoholic beverages for 24 hours. Just a single dose of medication is needed to rid the body of the disease. However, without proper precautions, an individual may contract the disease repeatedly. In fact, most people develop trichomoniasis again within three months of their last treatment.

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.

Mass Loss from a Supermassive Star Mass Loss from a Supermassive Star
During drought years on the Galapagos, small, easily eaten seeds become rare, le During drought years on the Galapagos, small, easily eaten seeds become rare, le
The age-related increase in spirituality is different for two cohorts born seven years apart. The ... The age-related increase in spirituality is different for two cohorts born seven years apart. The ...
Tracing numbers and alphabets by nat 3 years old Tracing numbers and alphabets by nat 3 years old
Video: Protein catabolism (Krebs cycle) and Protein anabolism (protein synthesis)

For a complete list of videos, visit our video library