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
Yanka [14]
2 years ago
12

What is a mixture and why is the air we breathe a mixture?

Biology
2 answers:
Anna007 [38]2 years ago
4 0

A mixture is a material made up of two or more different chemical substances which are not chemically combined.

Air is a mixture because the components of air are not chemically combined together.

<h3>What is a mixture?</h3>

A mixture is a material made up of two or more different chemical substances which are not chemically combined. This mixture can be separated using physical method.

The composition of the air we breathe include the following;

  • Oxygen
  • Nitrogen
  • Carbon (iv) oxide
  • Noble gases

Air is a mixture because the components of air are not chemically combined together.

Learn more about mixtures here:brainly.com/question/10677519

Lelechka [254]2 years ago
3 0

Answer:

We breathe (mostly) an homogeneous mixture of elements: elemental nitrogen, N2 ; elemental oxygen, O2 . The mixture is homogeneous because the dioxygen and dinitrogen are in the same phase and state.

You might be interested in
Vascular tissue includes what other structures
harina [27]

Answer:

Vascular tissue includes xylem, phloem, parenchyma, and cambium cells.

8 0
3 years ago
Cereals and legumes are complementary in the diet because Group of answer choices Cereals counteract the antinutritional factors
rusak2 [61]

Answer:

A diet combining legumes and cereals will have a good balance of essential amino acids

Explanation:

Cereals are grains that are rich in vitamins, carbohydrates, protein and other essential nutrients, they include wheat, rice, sorghum etc. Legumes include a wide range of seeds, fruits, nuts, vegetables that are rich in proteins, carbohydrates and other nutrients, examples include peas, beans, lentils etc.

Cereals and legumes are referred to as staple foods, they are usually used to complement each other because combining them will result in a good balance of essential amino acids. In cereals, lysine is a limiting amino acid but is usually in high amounts in legumes. However, in legumes cysteine, trypthophan and methionine are the limiting amino acids but are found in cereals. Therefore, this makes legumes and cereals complementary in the diet as it significantly increases the protein quality of the diet.

4 0
3 years ago
How do living cells use the instructions in their DNA to perform tasks?
Ksenya-84 [330]

Answer:

DNA contains the instructions to help the cell survive. They help the cell produce protein in the stages of protein synthesis.

7 0
3 years ago
The idea that, when life originated on earth, a macromolecule other than dna served the role of information storage and that thi
svet-max [94.6K]

The RNA world hypothesis states that the earlier life-forms had relied only on RNA (Ribonucleic Acid) for the purpose of catalyzing the chemical reactions, and storing the genetic information. This hypothesis was proposed by Leslie Orgel, Carl Woese, and Francis Crick.

This hypothesis states that long before the living forms evolved to use DNA as the genetic storage material, the RNA molecules served the purpose of both storing the genetic information and carrying out catalysis, but because of its instability, DNA evolved.

Hence, the answer is RNA world hypothesis.

4 0
3 years ago
A rise in the level of interferon in the body suggests what kind of infection
Bess [88]
A lymphatic system. I really hope this answer helps you.
7 0
3 years ago
Read 2 more answers
Other questions:
  • In the term 2pq of the Hardy-Weinberg equation. Why is the multiplication by two necessary?
    9·1 answer
  • Which statement about subatomic particles is not true
    13·2 answers
  • Which of the following is the best description of an adoption​
    14·1 answer
  • 1-What is the modern periodic table?
    12·1 answer
  • How are carrots an energy link between you and the sun?
    5·1 answer
  • What occurs in the life cycle of a moss but not in the life cycle of a gymnosperm?
    11·1 answer
  • What is the correct order of this
    8·1 answer
  • ana walked through this part of the forest. When she passed under some low branches, water drops fell on her head. What most lik
    8·1 answer
  • Describe methods of replication and protein synthesis in bacteria and viruses.
    15·2 answers
  • WILL GIVE BRAINLIEST
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!