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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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Without undergoing any changes itself, the _____ makes changes to the ______.
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Without undergoing any changes itself, the enzyme makes changes to the substrate.

<h3>What is an enzyme?</h3>

An enzyme is a biological catalyst that acts by lowering the activation energy in a chemical reaction.

In a chemical reaction, an enzyme binds to a substrate to convert it to one or more products.

In conclusion, without undergoing any changes itself, the enzyme makes changes to the substrate.

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2 years ago
Which of the following processes does NOT occur in both plant and animal cells?
zimovet [89]
Photosynthesis occurs in plant cells, but does not occur in animal cells.
8 0
3 years ago
Living organisms can incorporate ________ into their metabolism.(1 point)
Dmitrij [34]

Answer:

nitrates

Explanation:

3 0
3 years ago
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If the objective lenses of a microscope can be changed without losing focus on the specimen, they are said to be ______. A) equi
aleksandr82 [10.1K]

Answer:

C) parfocal.

Explanation:

A microscope can be defined as an optical device that is typically used to make an enlarged (magnified) image of a minute (small) object and as such reveals all the little information about the object that cannot be seen by the natural human eye.

A microscope is said to be parfocal if its lense is binocular and they can both be in focus.

Hence, if the objective lenses of a microscope can be changed without losing focus on the specimen, they are said to be parfocal.

7 0
2 years ago
Two cells in the same organism differ only in the number of chloroplasts they contain. The first cell has multiple chloroplasts,
FromTheMoon [43]

Answer;

The second cell would not be able to produce as much food because it could not capture sunlight.


Explanation;

The first cell has multiple chloroplasts, and the second cell has very few which means the cell with more chloroplasts would make more food.

Chloroplast is an organelle is the cell where the process of photosynthesis (process in which plants make their own food) takes place.

A cell with multiple chloroplasts would make more food through photosynthesis compared to a cell with few chloroplasts.

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