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
prohojiy [21]
3 years ago
6

What is the approximate percent of oxygen by volume present in Earth's lower atmosphere?

Biology
1 answer:
Svetlanka [38]3 years ago
4 0

Answer:  21 percent

Explanation:

According to NASA, the gases in Earth's atmosphere include: Nitrogen — 78 percent. Oxygen — 21 percent. Argon — 0.93 percent.

You might be interested in
Which can be a genetic disease that requires control of insulin levels?
sashaice [31]
Diabetes. My dads a doctor Ik for sure if u need an explaination i will send one

4 0
3 years ago
Read 2 more answers
Suggest two ways you could determine if two species are mimics in nature.
yawa3891 [41]

Answer:

A species could be a mimic if it's colors are slightly off from the creature they're trying to mimick, or, upon closer inspection, have a different body shape than the creature they're trying to mimick.

4 0
3 years ago
Cholesterol is repelled by water and can be found between the layers of the phospholipids in the plasma membrane. What can be co
Vlad1618 [11]

Answer:

The correct option is <em>B. Cholesterol is non-polar.</em>

Explanation:

Cholesterol is a non- polar substance and due to this property it is an active part of the cell membrane. Cholesterol molecules help to maintain the stability of a cell. When the temperatures are high, cholesterol stops the cell membrane from crystallization. When the temperatures are low, cholesterol reduces the packaging of molecules of phospholipids. As a result, fluid phase is archived by the cell membrane.  

6 0
3 years ago
Why did the White House experience water damage ?
bagirrra123 [75]

Answer:

2. It is made of sandstone which is very porous and is easily penetrated by rainwater

Explanation:

The White House is made of gray-colored sandstone that is brought from quarry in Aquia, Virginia. The north and south porticos of white house building are constructed with red Seneca sandstone brought from Maryland.  These sandstones are porous in which rainwater is easily penetrated in it that cause damage to the white house building so it is concluded that the building is made of porous sandstone.

5 0
3 years ago
What kinds of traits do not evolve through natural selection?
Harrizon [31]

Natural selection doesn't favor traits that are somehow inherently superior. Instead, it favors traits that are beneficial (that is, help an organism survive and reproduce more effectively than its peers) in a specific environment. Traits that are helpful in one environment might actually be harmful in another.

(one again, I hope this helps ^^)

8 0
3 years ago
Other questions:
  • A meander that is cut off to become completely isolated from the main channel, but which retains water, is a(n) ______.
    8·1 answer
  • Which is correct regarding the frequency of meals for toddlers and preschoolers?
    6·1 answer
  • What is the difference between endocrine and exocrine glands?
    14·1 answer
  • Hydrogen bonding accounts for which of water's properties? Click all that
    10·1 answer
  • What do your veins do to keep your blood flowing in one direction?
    8·1 answer
  • The red fox lives in temperate regions and has a dark, reddish coat to help it hide from predators. The kit fox is sandy-colored
    6·1 answer
  • Which of the following could be present in a eukaryotic cell? *
    12·2 answers
  • Respiratory system, circulatory system, what stuck, digestive system, and how do they work together?
    9·2 answers
  • Give 3 examples of adaptations observed in plant species
    9·1 answer
  • in pigs notice that there are different numbers of lobes on the right and left lungs. why would this be the case?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!