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worty [1.4K]
3 years ago
15

-

Biology
1 answer:
kipiarov [429]3 years ago
3 0

Answer:

Nitrogen

Explanation:

It can change in the Atmosphere or on land:)!

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Which of the following is not an example of separation by physical means?
Alina [70]
C) Electrolysis <span> 

WHY?

</span><span>electrolysis is a method of using an electric current to drive an otherwise non-spontaneous chemical reaction. Electrolysis is commercially highly important as a stage in the separation of elements from naturally-occurring sources such as ores using an electrolytic cell.</span><span>


**Sorry if wrong tried my best X3*

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A different flask of cultured cells contains 7 x 105 cells in 50 ml of medium. What is the concentration of cells (per ml) (0.5p
Nadusha1986 [10]

To find the average number of cell cultured per area, you have to divide the total cell count with the total area. The cultured cells contains 7 x 10^5 cells count in 50 ml of medium area. The number would be: 7 x 10^5 cells / 50ml= 0.14x 10^5 cells /ml= 1.4 x 10^4 cells/ml

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3 years ago
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Define reproduction plz
WINSTONCH [101]

Answer:

biological process by which new individual organisms are produced

7 0
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Several members of the same family were diagnosed with he same kind of cancer when they were unusually young. Which one of the f
Verdich [7]

Answer:

(c) Inherited a mutation in a gene required for mismatch repair

Explanation:

Gene mutations are occasional changes that occur in genes, that is, the procedure by which a gene undergoes a structural change. Mutations involve the addition, deletion or substitution of one or a few nucleotides of the DNA strand. Mutation provides the emergence of new forms of a gene and, consequently, is responsible for gene variability.

It is common for several members of the same family to have the same genetic mutations, as the gene affected by the mutation may condition a trait that DNA cannot repair. An example of this is the family shown in the question above, where several people were diagnosed with the same type of cancer while still young. What probably happened in this family was that people diagnosed with cancer inherited a mutation in a gene needed to repair incompatibility.

6 0
3 years ago
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A natural disaster caused a population of 4,695 organisms to migrate to a new habitat. A few generations after the disaster, it
Alex Ar [27]

Answer:

49.54

Explanation:

Given parameters:

Number of organisms in original habitat = 4695

Number of organism in new habitat = 2326

Solution:

To find the percentage of the organisms in the new habitat that has migrated to the new habitat, we use the expression below:

% of the population in the new habitat = \frac{number of organisms in new habitat}{number of organisms in original habitat} x 100

% of the population in the new habitat = \frac{2326}{4695} x 100 = 49.54%

6 1
3 years ago
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