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
miss Akunina [59]
3 years ago
15

The four essential elements for life are _______. a.carbon, hydrogen, oxygen and nitrogen b. carbon, hydrogen, oxygen and sulfur

c. carbon, nitrogen, oxygen and sulfur d. iron, nitrogen, oxygen and magnesium
Biology
2 answers:
umka21 [38]3 years ago
7 0
Answer is A to all my homies out derrr
Dmitrij [34]3 years ago
4 0
The correct answer is "A. carbon, hydrogen, oxygen and nitrogen".



Scientists believe that out of the 116 known elements, only 25 are used by mammals (and therefore by humans). Out of the 25 elements that are believed by scientists to support human life, only four of these elements - carbon, oxygen, hydrogen, and nitrogen - make up about 96% of the human body and are found in the basic structure of all biochemical molecules within the human body. Because of this, carbon, hydrogen, oxygen, and nitrogen are considered "the four essential elements" supporting human life. However, it is also important to keep in mind that although many of the other 25 elements present in the human body are required in only small amounts, they play an important role in keeping the body functioning correctly, as well.
You might be interested in
What happens to the most of the energy stored in glucose in anaerboic respiration?
vovangra [49]
Cells undergoing aerobic respiration produce 6 molecules of carbon dioxide, 6 molecules of water, and up to 30 molecules of ATP (adenosine triphosphate), which is directly used to produce energy, from each molecule of glucose in the presence of surplus oxygen
6 0
3 years ago
Nerve cells are specialized to transmit chemical signals throughout the body. Some nerve cells in humans can be several feet lon
Doss [256]

Answer:

A.

Explanation:

5 0
3 years ago
Read 2 more answers
Blood type A person marries a blood type B person, both are heterozygous for the trait, what could their offspring be?
Vika [28.1K]

Answer:

All of the above

Explanation:

6 0
2 years ago
What are some functions of cerebrospinal fluid?
Nat2105 [25]

Protects brain and spinal cord from trauma, as well as supplies nutrients to nervous system tissue. It also removes waste from cerebral metabolism.

5 0
3 years ago
What is the substitute of u in tRNA
Rama09 [41]
I believe it is A (Adenine)
3 0
3 years ago
Read 2 more answers
Other questions:
  • In_____ both species benefit from the interaction.
    12·1 answer
  • Why do we see plants as differnet colors?
    5·1 answer
  • . When psychologists say that a given trait is due more to nature than nurture, they mean that the trait
    12·1 answer
  • What are unicellular prokaryotes that live in dust?
    5·1 answer
  • Which structure in this plant cell represents the site of ATP production from photosynthesis?
    9·2 answers
  • What is the third element
    8·2 answers
  • A key should be parallel. An example of parallel choices is _____
    7·1 answer
  • Explain how mining can be harmful to the environment
    10·1 answer
  • A pot of water is heated on an electric stove. Which of the following best describes
    7·1 answer
  • How are saturated and unsaturated fatty acids different
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!