This topic contains a solution. Click here to go to the answer

Author Question: The first birds and mammals appeared 135 million years ago during the ____________________ period. ... (Read 52 times)

APUS57

  • Hero Member
  • *****
  • Posts: 571
The first birds and mammals appeared 135 million years ago during the ___________________ _ period.
 Fill in the blank(s) with correct word

Question 2

The ___________________ _ in the atmosphere filters out the ultraviolet light from the sun that is harmful to life.
 Fill in the blank(s) with correct word



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

leeeep

  • Sr. Member
  • ****
  • Posts: 315
Answer to Question 1

Jurassic

Answer to Question 2

ozone




APUS57

  • Member
  • Posts: 571
Reply 2 on: Jul 18, 2018
Thanks for the timely response, appreciate it


Sarahjh

  • Member
  • Posts: 370
Reply 3 on: Yesterday
Gracias!

 

Did you know?

Cutaneous mucormycosis is a rare fungal infection that has been fatal in at least 29% of cases, and in as many as 83% of cases, depending on the patient's health prior to infection. It has occurred often after natural disasters such as tornados, and early treatment is essential.

Did you know?

The eye muscles are the most active muscles in the whole body. The external muscles that move the eyes are the strongest muscles in the human body for the job they have to do. They are 100 times more powerful than they need to be.

Did you know?

Over time, chronic hepatitis B virus and hepatitis C virus infections can progress to advanced liver disease, liver failure, and hepatocellular carcinoma. Unlike other forms, more than 80% of hepatitis C infections become chronic and lead to liver disease. When combined with hepatitis B, hepatitis C now accounts for 75% percent of all cases of liver disease around the world. Liver failure caused by hepatitis C is now leading cause of liver transplants in the United States.

Did you know?

People often find it difficult to accept the idea that bacteria can be beneficial and improve health. Lactic acid bacteria are good, and when eaten, these bacteria improve health and increase longevity. These bacteria included in foods such as yogurt.

Did you know?

Looking at the sun may not only cause headache and distort your vision temporarily, but it can also cause permanent eye damage. Any exposure to sunlight adds to the cumulative effects of ultraviolet (UV) radiation on your eyes. UV exposure has been linked to eye disorders such as macular degeneration, solar retinitis, and corneal dystrophies.

For a complete list of videos, visit our video library