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sergey [27]
2 years ago
11

What are the two classes of pure substances?

Biology
2 answers:
Viefleur [7K]2 years ago
8 0

Elements and compounds

Alenkinab [10]2 years ago
5 0

Answer:

Elements and compounds

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Cell to cell communication is a key component of higher order biological organization and responses. Communication evolved billi
vladimir1956 [14]

Answer : (D)

Explanation: Just as we communicate to each other to initiate a response, cells must also communicate. Of the 7 characteristics of life the characteristic that states a living things respond to their environment most closely relates why cell communication is important and it evolved

3 0
3 years ago
On the pH scale, acids fall between ____ and bases fall between
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Answer:

The correct answer is - O and 6.9; 7.1 and 14

Explanation:

A measuring scale that tells about the acidity or basicity or alkaline nature of a particular object or solution is possible with the help of a pH scale that measures how acidic or basic a solution or object is.

It ranges between 0 to 14. pH less than 7 or ranging from 0.0 to 6.9 is acidic and more than 7 or from 7.1 to 14.0 is basic or alkaline in nature. A measure of the relative amount of H+ ion and OH- ions in water is pH.

3 0
2 years ago
¿Cómo afecta la contaminación del aire generadas por las actividades humanas al sistema respiratorio de los seres vivos?
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air pollution can irritate your airways and may cause shortness of breath, coughing, wheezing, asthma episodes and chest pain.

Explanation:

Hope this helps:)

5 0
2 years ago
When the chemical name of a compound is being written the subscripts will determine the
erma4kov [3.2K]

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It will determine the number of molecules of the particular chemical in the compound.

8 0
2 years ago
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Bacteria can reproduce quickly by means of binary fission. Because of this, after binary fission
Dahasolnce [82]

C) all the offspring will be genetically identical.

Explanation:

During binary fission, all the offspring will be genetically identical and little to no variation occurs.

Binary is an asexual form of reproduction which does not involve the combination of gametes from the parents.

  • During binary fission, the parent simply divides to produce young ones.
  • In this process, the offspring replicates the genetic component of the parents making it identical.
  • The offspring is a direct copy of the parents.
  • It is only in sexual reproduction that genetic materials are exchanged between the parents and offspring. This leads to genetic variation.

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Asexual reproduction brainly.com/question/9424950

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2 years ago
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