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

Author Question: The first birds and mammals appeared 135 million years ago during the ____________________ period. ... (Read 78 times)

APUS57

  • Hero Member
  • *****
  • Posts: 571
on: Jul 18, 2018
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
Reply #1 on: Jul 18, 2018
Answer to Question 1

Jurassic

Answer to Question 2

ozone


APUS57

  • Member
  • Posts: 571
Reply 2 on: Jul 18, 2018
:D TYSM

skipfourms123

  • Member
  • Posts: 343
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

In the ancient and medieval periods, dysentery killed about ? of all babies before they reach 12 months of age. The disease was transferred through contaminated drinking water, because there was no way to adequately dispose of sewage, which contaminated the water.

Did you know?

To maintain good kidney function, you should drink at least 3 quarts of water daily. Water dilutes urine and helps prevent concentrations of salts and minerals that can lead to kidney stone formation. Chronic dehydration is a major contributor to the development of kidney stones.

Did you know?

The calories found in one piece of cherry cheesecake could light a 60-watt light bulb for 1.5 hours.

Did you know?

More than 20 million Americans cite use of marijuana within the past 30 days, according to the National Survey on Drug Use and Health (NSDUH). More than 8 million admit to using it almost every day.

Did you know?

Never take aspirin without food because it is likely to irritate your stomach. Never give aspirin to children under age 12. Overdoses of aspirin have the potential to cause deafness.

Ngandong calottes from Java are the youngest H. erectus fossils at perhaps 27,000-50,000 years old. Ngandong calottes from Java are the youngest H. erectus fossils at perhaps 27,000-50,000 years old.
The Long Valley Caldera Erupted the Bishop Ash 760,000 Years Ago The Long Valley Caldera Erupted the Bishop Ash 760,000 Years Ago
Changes in Synaptic Density From Birth to Age 2 Synaptic connections increase throughout the first Changes in Synaptic Density From Birth to Age 2 Synaptic connections increase throughout the first
Atmospheric CO2 Concentrations Increased Very Rapidly during the Last 200 Years Atmospheric CO2 Concentrations Increased Very Rapidly during the Last 200 Years
Embryonic Period Embryonic Period
Birds-eye view of land Birds-eye view of land
Video: Biological organic compounds

For a complete list of videos, visit our video library