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Ket [755]
3 years ago
10

Any substance with constant composition

Biology
2 answers:
Dominik [7]3 years ago
6 0

Answer:

Pure substance

Explanation:

givi [52]3 years ago
4 0



Answer: carbon dioxide


Explanation:

A chemical substance is a form of matter having constant chemical composition and characteristic properties.[1][2] Some references add that chemical substance cannot be separated into its constituent elements by physical separation methods, i.e., without breaking chemical bonds.[3] Chemical substances can be simple substances[4], chemical compounds, or alloys. Chemical elements may or may not be included in the definition, depending on expert viewpoint.[4]

Chemical substances are often called 'pure' to set them apart from mixtures. A common example of a chemical substance is pure water; it has the same properties and the same ratio of hydrogen to oxygen whether it is isolated from a river or made in a laboratory. Other chemical substances commonly encountered in pure form are diamond (carbon), gold, table salt (sodium chloride) and refined sugar (sucrose). However, in practice, no substance is entirely pure, and chemical purity is specified according to the intended use of the chemical.
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Which of the following situations is most likely to involve the action of the parasympathetic nervous system?
stiv31 [10]

Out of the following given choices

a) Brooke’s finger accidentally grazes the hot iron; she immediately yanks her hand away.

<span> b) After a satisfying evening meal, Callum relaxes in front of the television. <span> <span>c) Walking toward her car is a deserted parking garage one night, Danica is surprised by a strange man appearing from nowhere.</span> <span> <span>d) Emmeline feels queasy as she approaches the front of the class to give a speech; suddenly, her throat goes dry.</span>  
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The answer is B. The parasympathetic nervous system is part of the autonomic nervous system that regulates the unconscious actions of the body.  The system is regarded as significant in the ‘rest-and-digest’ activity and also the ‘breed-and-feed’. </span></span></span></span>
5 0
3 years ago
Between two organisms in
Ainat [17]

Answer:

This question is not well placed. It should be " a relationship between two organisms in which both benefit is called".

The answer is SYMBIOSIS

Explanation:

Living organisms tend to interact with one another in their natural environment. This interaction are of different types depending on the effect on the involved organisms. One of those interactions is SYMBIOSIS. Symbiosis is a relationship between two organisms in which both of the organisms benefit from one another.

An example is the relationship between the "CATTLE AND EGRET". The cattle provides food for the egret when they feed on the insect parasites on their body while the egret helps the cow get rid of detrimental parasites.

7 0
3 years ago
A person with 2 blue eye genes has a child with a person with 2 brown eye genes. Blue is dominant and brown is recessive. What c
grandymaker [24]

Answer:

The answer is blue

Explanation:

The reason it is blue is because the blue color is the dominant gene, which means it is the gene that will express itself

7 0
3 years ago
Which action would increase the amount of oxygen in a fish tank?
Mila [183]

Answer:

<u><em>B) Adding more plants</em></u>

Explanation:

Live plants produce oxygen and absorb carbon dioxide and ammonia in the water that fish generate

8 0
3 years ago
Read 2 more answers
A bone that is broken but does not pierce the skin is a what?
Reika [66]
It is just called: a simple fracture. BUT when the bone does pierce the skin it's called a compound fracture. <span />
3 0
3 years ago
Read 2 more answers
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