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
yanalaym [24]
3 years ago
10

Where does the oxygen that we breathe come from? (Multiple Choice)

Biology
1 answer:
satela [25.4K]3 years ago
6 0

Answer:

Water

Explanation:

Scientists agree that there's oxygen from ocean plants in every breath we take. Most of this oxygen comes from tiny ocean plants – called phytoplankton – that live near the water's surface and drift with the currents. Like all plants, they photosynthesize – that is, they use sunlight and carbon dioxide to make food.

Hope this helped, Have a Wonderful Day!!

You might be interested in
if an element has a half-life of 30 million years and there is 12.5% of it remaining in a rock, how old is that rock
Assoli18 [71]

Answer:

The half-life of a substance is the amount of time it takes for half of that substance to decay. However, after two half-lives, half of the half remaining will decay, leaving you with one quarter of the original substance.

So, after 1 million years you will have 50% of the original substance remaining.

And, after 2 million years you will have 25% of the original substance remaining.

After 3 million years you will have 12.5% of the original substance remaining.

And after 4 million years you will have 6.25% of the original substance remaining.

Explanation:

Hope it helps:)

3 0
3 years ago
Which molecule prevents a muscle contraction from occurring when the muscle is at rest?
AysviL [449]

Troponin-tropomyosin molecules prevents a muscle contraction from occurring when the muscle is at rest.

<h3>What is muscle contraction?</h3>

The activation of tension-producing regions within muscle cells results in muscular contraction. Because muscle tension can be created without changes in muscle length, such as when holding something heavy in the same position, muscle contraction does not always imply muscle shortening in physiology. Muscle relaxation, or the return of the muscular fibers to their low tension-generating state, occurs after a muscle contraction has finished.

Both length and tension can be used to characterize muscle contractions. If the muscle tension varies but the muscle length doesn't, the muscle contraction is said to be isometric. A muscle contraction is isotonic, however, if the tension in the muscle remains constant during the contraction.

To learn more about muscle contraction with the help of given link:

brainly.com/question/10115123

#SPJ4

5 0
1 year ago
(02.04 HC)List an example of how an ecosystem can be affected by weather patterns. Explain how ocean temperatures affect weather
koban [17]
Tons of rain can cause an ecosystem to flood, killing species that are not meant to withstand lots of water. Ocean temperature can slow down or speed up evaporation, affecting precipitation rates.

Hope I helped!
~ Zoe

8 0
2 years ago
Read 2 more answers
Which two hormones closely control levels of calcium in the blood?
Reika [66]

Answer:

parathyroid hormone (PTH), which is produced by the parathyroid glands. I hope it helps

Explanation:

4 0
2 years ago
Read 2 more answers
A nurse informs a woman that there is nothing more that can be done medically for her premature infant who is expected to die. t
allsm [11]
The answer to this question would be: Inhibited grief.

Inhibited grief happens when someone <span>does not display any sign of mourning. This kind of grief can cause a health problem like a stomach ache or a headache. It is important to resolve the grief when losing someone important so that grief doesn't come back as an unexplained medical problem.</span>
8 0
2 years ago
Other questions:
  • 9. If the diploid number in a liver cell of an organism is 52
    10·2 answers
  • Why is it important<br> for breeders to select traits<br> that are inherited?
    14·1 answer
  • Residential construction is expanding in Florida, the expansion has caused fragmentation of habitats, one of the results of the
    6·2 answers
  • Jenner's successful use of cowpox virus as a vaccine against the smallpox virus was due to the fact that ______. (A) the cowpox
    11·1 answer
  • What is the expected phenotypic ratio from a cross of heterozygotes (A1A2 x A1A2) for a phenotype that expresses incomplete domi
    11·1 answer
  • What is an advantage of using pluripotent cells instead of multipotent cells in
    7·2 answers
  • 1. In what form is O2 transported from the lungs to the tissues​
    6·1 answer
  • Osmotic pressure is: the pressure required to stop the flow of solvent from a region of high solute concentration to a region of
    15·1 answer
  • Why do plant cells need chloroplasts?
    6·2 answers
  • The process of dissolving bone and returning its minerals to the bloodstream is known as?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!