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
Travka [436]
2 years ago
14

Please help I don't understand.

Biology
2 answers:
cupoosta [38]2 years ago
7 0

Answer:

False .

atmosphere in early earth was filled with both methane and ammonia

Now days we have nitrogen, oxygen Carbon dioxide and variable gases

Softa [21]2 years ago
5 0

Answer:

False, because the atmosphere is not composed completely of these two gases. Ammonia and methane now make up little to none of the atmosphere.

You might be interested in
The hardy-Weinberg principle is written as the equation p^2+2pq+q^2=1 what does p represent
poizon [28]

The Hardy-Weinberg equation is:


p^{2} +2pq+q^{2}=1


where p generally represents the frequency of the homozygous dominant population.


The q usually represents the frequency of the homozygous recessive population, and the 2pq term represents the frequency of the heterozygous population.

5 0
3 years ago
Read 2 more answers
Mature human sperm and ova are similar in that they _____. mature human sperm and ova are similar in that they _____. are approx
garik1379 [7]

Mature human sperm and ova are similar in that they both have the same number of chromosomes. The human sperm and ova are the reproductive cell in male and female respectively. The sperm cells are motile while the ova are not. A mature human sperm and ova both contain 23 pairs of chromosomes.






6 0
3 years ago
A LEAF IS GREEN BECAUSE……<br> HELP ME AND ILL PUT U ON BRAINLIEST !<br> - THANKYOU
hoa [83]
The answer is definitely A
8 0
3 years ago
Placing pressure on a cut will constrict blood vessels manually, and encourages ________.
Makovka662 [10]
I am certain that placing pressure on a cut will constrict blood vessels manually, and encourages vascular spasms. 
Vascular spasms are sudden, brief tightening of the muscle cells inside the walls of a blood vessels. It is the first response as the blood vessels constrict to allow less blood to be lost. In the second step, platelet plug formation, platelet stick together to form a temporary seal to cover the break in the vessel wall, the third step is the coagulation or blood clotting. 
6 0
3 years ago
Why is the percentage of food eaten a good number to use
Aleonysh [2.5K]
To understand that you have to balance each food you intake in your body. Balancing your food is not only useful to make you stay fit but it can enhance your mental and physical health. With the use of proper diet, you will go on to your everyday routine without feeling uncomfortable.
9 0
3 years ago
Other questions:
  • Which of the following cells would not have a well–defined nucleus but would have a thick cell wall and ribosomes?
    11·1 answer
  • In a hypothetical situation, a certain species of flea feeds only on pronghorn antelopes. In thewestern United States, pronghorn
    7·1 answer
  • What's the biology?​
    15·2 answers
  • Where is the busiest burn in America?
    15·1 answer
  • 1) If a person has sex chromosomes: XXY, what is their gender?
    15·1 answer
  • The red algae contain an accessory pigment called
    14·1 answer
  • When two monomers come together to make a polymer, a molecule of what is released? a.NO2 b.CO2 c.H2O d.H2O2
    6·1 answer
  • A mouse had a gene sequence of GTT coding for leucine, an amino acid. mutation in this gene led to the formation of GTG. However
    15·1 answer
  • The organic compounds that have many structural purposes and are used
    8·1 answer
  • How does carbon dioxide concentration affect photosynthesis rate?
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!