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
LenKa [72]
3 years ago
8

The mass extinctions that occurred 250 million years ago and 65 million years ago may have been due to gradual processes or

Biology
2 answers:
schepotkina [342]3 years ago
4 0

Answer:

The mass extinction that occurred 250 years ago and the mass extinction that   occurred 65 million years ago may have been caused due to gradual processes or due to the catastrophic effect.

The mass extinction that occurred 250 million years ago was caused to the sudden climatic change and lead to extinction of almost 95% of the population present at that time.

The extinction of dinosaur took place 65 million years ago due to the meteorite that hit the earth.                

Nitella [24]3 years ago
3 0
Or otherwise called (Natural selection)
You might be interested in
Can someone write a paragraph explaining this drawing of thermal energy. Please dont use google, I'll mark brainiest and give ex
denis23 [38]

Answer:

Warmth energy, likewise called warm energy, is the energy an item has in view of the development of its particles, and warmth can be moved starting with one article then onto the next article. Warmth energy on Earth comes from the sun

Explanation:

3 0
2 years ago
If the phenotype frequency for a particular phenotype is 10% in a population of 100, how many individuals have that phenotype? a
yKpoI14uk [10]
A is correct. 10% of 100 is 10, so therefore, 10 members of the species have that particular phonotype. Hope this helps!
5 0
3 years ago
Two teams are playing tug-of-war. Each team is pulling on the rope with a different force—Team X with 500 newtons and Team Y wit
Nikitich [7]
No question, but team x has 200 more newtons than team y and therefore will win.
5 0
3 years ago
Read 2 more answers
Identify the areas of study traceable to the pioneering work of georg simmel.
makkiz [27]
<span>George Simmel was a pioneer in sociological studies due to the fact that he developed the concept of the sociological imagination, and believed that societies can be understood through an empirical scientific approach known as positivism which is still used in research today.</span>
7 0
2 years ago
Read 2 more answers
Cytotoxic t-cell subpopulations are specialized to combat _______ pathogens, whereas helper t-cell subpopulations are specialize
Katarina [22]
<span>Cytotoxic t-cell subpopulations are specialized to combat intracellular pathogens, whereas helper t-cell subpopulations are specialized to combat extracellular pathogens.

</span>Cytotoxic t-cell  are CD8+ cells. Cytotoxic t-cell uses granzymes to <span>kill </span><span>intracellular bacteria, that lives in the cytosol such as viruses. They identify the pathogen forgein peptids that are bounded to MHC-I on the cell surface.
</span>
cd4+ T helper (Th) cells include Th1, Th2, and Th17 cells. They contribute to aliergic reactions and fighting extracellular  parasites.
8 0
3 years ago
Other questions:
  • Describe three ways that a crime scene can be recorded. What is a benefit of each?
    8·2 answers
  • Imagine that you are a graduate student working in a cancer lab. You accidentally mix unlabeled tubes of carcinoma cells with tu
    12·1 answer
  • | ANSWER NEED ASAP | Which of these is a disease that testing can be done for in either the parents or the child?
    14·2 answers
  • _______ is a naturally occurring radioactive gas that is produced from the decay of uranium in rock. After seeping through found
    12·1 answer
  • What word or two-word phrase best describes the shape of the phosphorus tribromide ( pbr3 ) molecule?
    12·1 answer
  • Why might farmers use artificial selection to develop different types of vegetables?
    15·1 answer
  • How is the plasma membrane of a cell organized?
    14·1 answer
  • ______ transport moves nutrients from low to high
    7·1 answer
  • The nurse identifies which symptom as a manifestation of right-sided heart failure (hf)?
    6·1 answer
  • Four substances are important for both
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!