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
Darina [25.2K]
2 years ago
8

When did most marine life go extinct?

Biology
1 answer:
irinina [24]2 years ago
8 0
252 Ma<span> (million years) 
Please give brainliest

</span>
You might be interested in
How do u do punnet squares
Readme [11.4K]

Answer:

    X.     X

x/. Xx     / Xx

--------------------

x/ Xx        / Xx

Explanation:

3 0
3 years ago
Read 2 more answers
In which month would Chicago experience the Autumnal (fall) Equinox?
VashaNatasha [74]

Answer:

This means Chicago will experience the equinox at 2:50 a.m., Phoenix at 1:50 a.m. and Los Angeles at 12:50 a.m., all local time. At this moment, the equator will be pointed directly at the center of the sun. The fall season will last until the winter solstice, which occurs around December 21

Explanation: Hope this helps u good luck

4 0
3 years ago
Human ABO blood type is controlled by the I locus and has three possible alleles. The alleles which code for type A blood (IA) a
Oxana [17]

Answer:

1/8 (12.5 %)

Explanation:

Cross: IAi X  IAIB

F1: 1/4 IAIA 1/4 IAIB 1/4 IAi 1/4 IBi

Phenotypes:

- IAIA and IAi >> type A blood

- IBi >> type B blood

- IAIB >> type AB blood

Phenotypic frequency type A blood: 1/2  (i.e., 1/4 IAIA +  1/4 IAi) >>

Probability to have 3 offspring with type A blood: 1/2 x 1/2 x 1/2 = 1/8

The human ABO blood group is a system consisting of there different alleles: A, B, and O. This system is used in genetics as an example of codominance because both A and B alleles are expressed in heterozygous individuals (i.e., IAIB), whereas only the allele A is expressed in individuals that have A and O alleles (since O allele is recessive to the A and B alleles).

6 0
3 years ago
Antibodies are produced when the body is exposed to
erica [24]


Antibodies are produced when the body is exposed to antigens.

During an initial encounter with a foreign antigen, the body's immune system namely the adaptive arm of the immune system, produces memory cells, a group of special lymphocytes that retain and store memory of the antigen.

On a second encounter with the same kind of antigen, the immune system "remembers" the antigen and mounts a rapid, specific and vigorous immune response against the antigen. This response includes the production of massive amounts of antibodies very specific to the antigen.

The antibodies effectively neutralize the antigen and facilitate its destruction.

3 0
3 years ago
Read 2 more answers
What is a territory?
Marat540 [252]

Answer:

its like your own land but only sertin people can go on it... I'm no tired sure tho thats what I think it is

Explanation:

if I'm right mark me has brainliest??

3 0
3 years ago
Other questions:
  • Diffusion occurs because of the ________________________ of molecules.
    12·1 answer
  • Natural selection produces changes most quickly in
    10·1 answer
  • Where does the organic material in soil originate?
    10·1 answer
  • Most animal cell membranes have proteins that pump ______ ions out of the cell and potassium ions into the cell.
    11·1 answer
  • In the open ocean, what zone do algae live in?
    15·2 answers
  • What is gravity?
    14·2 answers
  • What is true about the struction of the plasma membrane
    11·1 answer
  • A snake is about to eat some small eggs it has found in a bird's nest. A hawk swoops down and eats the snake. What is the role o
    5·2 answers
  • 2. What is formed when elements of matter are chemically combined?
    6·1 answer
  • Define cell division​
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!