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Alja [10]
3 years ago
12

A pure substance has a/an _______ composition.

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

Answer:

1. A pure substance has a  definite constant composition.

2. A compound is composed of two or more types of matter that can be present in varying amounts.

3. A solution is a homogeneous mixture.

4. A mixture that is not uniform throughout is a Heterogeneous mixture

5. A pure substance that cannot be broken down chemically is a element.

6. A characteristic of matter that’s not associated with a change in its chemical composition is known as a physical property.

7. Wax melting is an example of a physical change in the state of matter.

8. A banana peel turning brown is an example of a chemical change in the state of matter.

Degger [83]3 years ago
3 0

Answer:

constant

mixture

homogeneous

heterogeneous

element

physical

physical

chemical

Explanation:

A good answer should contain the following:

got this from penn foster

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A recipe calls for 1 cup of sugar and 1/2 cup of flour.Zoe uses 1 cup of salt and 1/2 cup of flour.
Ivenika [448]

Answer:

Substitution

Explanation:

Given the information in the question substitution seems like the most appropriate answer. Zoe used 1 cup of slat rather than 1 cup of sugar, she substituted sugar for salt.

Insertion is wrong because Zoe did not add another ingredient, there is still only 2 ingredients.

Transition is wrong because, given the information, because the state(liquid or solid) of the ingredients has not changed. Zoe is still use dry ingredients per say.

And beneficial also seems to be wrong because we don't know if using salt instead was beneficial to the recipe or to Zoe.

Explanation:

4 0
2 years ago
When the influenza virus enters into an epithelial cell within the respiratory tract, the infected cell responds by
Lena [83]

When the influenza virus enters an epithelial cell, the infected cell responds by posting antigens and acting as a flag for cytotoxic T cells.

<h3>What is the cell-mediated response?</h3>

The cell-mediated response is a type of immune response where the organism is able to respond to pathogens by immune cells.

Macrophages (as well as other immune cells ) can act during cell-mediated immune responses.

In conclusion, when the influenza virus enters an epithelial cell, the infected cell responds by posting antigens and acting as a flag for cytotoxic T cells.

Learn more about cell mediated responses here:

brainly.com/question/24378503

#SPJ1

8 0
2 years ago
Meiosis produces what type of cells
BlackZzzverrR [31]
Meiosis I produces 2 haploid cells and meiosis II produces four haploid cells.
4 0
3 years ago
Read 2 more answers
Compare and contrast serine proteases and aspartic proteases by completing the phrases. drag each answer to the appropriate blan
8_murik_8 [283]

Answer:

read the explanation.

Explanation:

Both are enzymes, both has active sites because they are enzymes. A difference is that serine proteases has serine aminoacids in it active site. The aspartic proteases has an activated water molecule bond to one or more aspartate aminoacid in its active site.

Serine proteases are two main kinds, chymotrypsin and subtilisin kind. Aspartic proteases are three main kinds, pepsin, cathepsin and renins.

Serine proteases are found either in eukaryotes and prokaryotes, meanwhile the aspartic proteases are found mainly in eukaryotes as molds and yeast but rarely in prokaryotes such as bacteria.

Hope this info is useful.

3 0
2 years ago
A seal is a mammal. How can it survive in the cold polar seas when a human can die in a few minutes
sweet [91]

Answer:

adaptation

Explanation:

it's body adapts to the cold plus they have a very thick skin

4 0
2 years ago
Read 2 more answers
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