This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: During which time period were dinosaurs most abundant?[br][br][b][color=black]Question ... (Read 12 times)

sjones

  • Hero Member
  • *****
  • Posts: 520
on: Jul 18, 2018
During which time period were dinosaurs most abundant?

Question 2

Why werent plants the first form of life to appear on earth?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

bubulittle310@msn.cn

  • Sr. Member
  • ****
  • Posts: 281
Reply #1 on: Jul 18, 2018
Answer to Question 1

Dinosaurs were most abundant during the Jurassic period, 180135 million years ago.

Answer to Question 2

Some 2.2 billion years ago, free oxygen was present in the atmosphere. Living things used this reactive substance,
not decaying plant material, in biochemical functions of their cells. The free oxygen in the atmosphere also
produced a layer of ozone, which filters out the ultraviolet light from the sun that is harmful to life.


sjones

  • Hero Member
  • *****
  • Posts: 520
Reply #2 on: Jul 18, 2018
TY


bubulittle310@msn.cn

  • Sr. Member
  • ****
  • Posts: 281
Reply #3 on: Jul 18, 2018
Happy to Help


« previous next »
 

Did you know?

The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.

Did you know?

After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.

Did you know?

Amoebae are the simplest type of protozoans, and are characterized by a feeding and dividing trophozoite stage that moves by temporary extensions called pseudopodia or false feet.

Did you know?

According to the CDC, approximately 31.7% of the U.S. population has high low-density lipoprotein (LDL) or "bad cholesterol" levels.

Did you know?

If you could remove all of your skin, it would weigh up to 5 pounds.

Three of the color variants found at Fossil Rim Wildlife Center in Texas Three of the color variants found at Fossil Rim Wildlife Center in Texas
Old Time Farm Shepherd Old Time Farm Shepherd
Additive Color Mixing and Paint Mixing Additive Color Mixing and Paint Mixing
How to set up and solve linear models (Question 3) How to set up and solve linear models (Question 3)
this is a math question this is a math question
economic question (having trouble) economic question (having trouble)
Video: The pH scale - Strong acids and Weak acids

For a complete list of videos, visit our video library