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inysia [295]
3 years ago
14

An unknown brown solid material was melted and then allowed to cool. It did not separate into different substances. Is the unkno

wn material a mixture or a pure substance?
I think the unknown solid is _______ because...
Biology
1 answer:
oksano4ka [1.4K]3 years ago
6 0
A pure substance, its a pure substance because nothing was seperated, which means nothing was mixed to begin with it was like that just to start. 
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This type of research is descriptive and investigates the why and how of decision making, not just what, where, when. These meth
sweet [91]

Answer:

The correct answer is - option D.

Explanation:

Qualitative research is research or scientific method which is involved in various subject matters and fields, of collecting observation and nonnumeric data. This is the research normally is descriptive, exploratory and other qualitative methods to answer the question.

It is an investigation that is not just addressed what and where but also to the questions like how, and why. This is the reason these are used in small samples rather than large samples and also used on species cases to get information.

Thus, the correct answer is - option D.

4 0
4 years ago
Nucleoplasmin is a nuclear protein. This protein was divided into two segments and linked to the same large cytoplasmic protein,
irakobra [83]

Answer:

The correct answer is option d) "Only one of the two fusion proteins possesses a nuclear localization signal".

Explanation:

A nuclear localization signal or sequence (NLS) serves as an amino acidic tag that is recognized by the cell, and the cells responds by importing the protein into the nucleus. In this example a protein was divided into two segments and was used to generate two fusion proteins. Since only one of the two proteins was found in the nucleus, we can conclude that only one of the two fusion proteins possesses a nuclear localization signal.

4 0
3 years ago
What is a mutagen?
Anna11 [10]

Mutagen is an environmental agent that changes the DNA.

8 0
3 years ago
Suggest how a cell may vary the rate of an enzyme controlled reaction:<br> nt
Marina86 [1]

Answer:

A cell may vary the rate of an enzyme controlled reaction by making more/less or degrading more/less.

Explanation:

A cell may vary the rate of an enzyme controlled reaction by making more/less or degrading more/less. Several factors affect the rate at which enzymatic reactions proceed include post translational modifications, substrate concentration, cofactors, temperature, pH, locations. The shape and structure of the enzyme will change as the pH value of the reaction medium changes.

5 0
3 years ago
Rapid digestion of a cell by its own lysosomes is called
Xelga [282]

When the lysosomes of a cell rapidly digest the cell itself, this process is known as autolysis. This self digestion process helps in the decomposition of the dead cells. The cell is dismantled by its own lysosomes, which digests the remains of the dead cell. It is an essential process in the life cycle of a cell. This self digestion of the cells is extremely important for the new cells to grow.

Hence, the correct answer is 'autolysis'.

7 0
3 years ago
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