1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Gelneren [198K]
3 years ago
10

When did the mass extinction occur? (Name the era and period)

Biology
1 answer:
kherson [118]3 years ago
6 0

Answer:

Explanation:

The first mass extinction is called the Ordovician-Silurian Extinction. It occurred about 440 million years ago, at the end of the period that paleontologists and geologists call the Ordovician, and followed by the start of the Silurian period. In this extinction event, many small organisms of the sea became extinct.

You might be interested in
how is it possible for a child to end up with a diiferent genotype or phenotype than either of their parents?
Naddik [55]
Tall parents can have a short child, short parents can have a tall child , and two parents of the same height may have a child in between? 
5 0
3 years ago
Read 2 more answers
How much of the suns radiation does earth receive?
raketka [301]

Answer:

The Earth receives about 71% of the suns radiation. About 29% of that radiation is actually reflected back into space.

Explanation:

Hope this helps:)

7 0
2 years ago
Read 2 more answers
Explain in details the mechanism of transportation in plants​
ch4aika [34]

Answer:

Explanation:

Plant transport systems move energy from leaves and raw materials from roots to all their parts. The xylem (tissue) moves water and minerals obtained from the soil to all other parts of the plants.

6 0
3 years ago
Analyze: Cellular respiration involves two phases. The anaerobic phase does not involve oxygen, while the aerobic phase does. Wh
mafiozo [28]

Answer:

The anerobic part takes place in the fluid part of the cytoplasm while the aerobic part takes place in the mitochondria

Explanation:

6 0
3 years ago
Which labeled placemark in the layers folder represents the stratosphere?
Leya [2.2K]
The atmosphere is divided into different regions, called layers. The layer closest to the surface is known as troposphere, after which comes the stratosphere. The stratosphere begins at an altitude of 10 miles above the surface of the earth and stretches up to 31 miles above the surface of the earth. It is the second layer of the atmosphere (beginning from the surface of the earth) and it is the region which contains ozone, which plays a vital role in stopping ultraviolet radiation from reaching the earth's surface.
7 0
3 years ago
Other questions:
  • Which of the following is NOT a disease caused by harmful bacteria
    5·2 answers
  • Why do tissues team up to form organs
    5·2 answers
  •  What is the most likely explanation for how speciation occurs?
    6·1 answer
  • In general what would a scientist do after forming a testable question
    13·1 answer
  • Except for __________ and __________, prenatal diagnosis should not be used routinely, since other methods have some chance of i
    15·1 answer
  • What happens to sedimentary rock after pressure occurs more layer
    15·2 answers
  • The chemical process for respiration
    5·2 answers
  • What is climate change?
    10·1 answer
  • Describe the structure of the ovule and the formation of the embryo sac
    10·1 answer
  • 1. The primary factors affecting population growth
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!