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g100num [7]
3 years ago
7

1. Which of the following events is not a source of genetic variation in eukaryotic organisms?

Biology
1 answer:
Lunna [17]3 years ago
5 0

Answer:

Mitosis

Explanation:

Mitosis is not a source of genetic mutation because it take place mostly in the somatic cells. This is because it does not lead to the production of gametes . In mitosis, the parent cells divide into two daughter cells and each daughter cells are genetically identical to the parent cell because they carry the same number of chromosomes as the parent cell. There is no genetic variation in this.

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25POINTSHELP ExampleS of how conditions on Earth would worsen if greenhouse gases increase.
Otrada [13]

ExampleS of how conditions on Earth would worsen if greenhouse gases increase.

  1. Increase Surface Temperautre
  2. Heats The Oceans
  3. Melts Polar Ice

Hope This Helps!

4 0
2 years ago
Read 2 more answers
A researcher recorded that a chemical reaction required 2.90 gal water and raised the temperature of the reaction vessel by 57 F
Bess [88]

<em>A. 11.0 L is the researcher's volume measurement to the SL units of liter</em>

<u>Explanation:</u>

Given that a researcher recorded that the chemical reaction has water = 2.90 gallon.

We have to convert the researcher's volume into the SL units of liter.

<em>So, we know that 1 gallon = 3.875 liters</em>.

Then we have to convert 2.90 gallons of water in to liters.

Then  , volume in L =(volume\ in \ gal) \times  (3.875 L/1 gal)                                   = (2.90) \times (3.875L/1 gal)                                  

= 11.0L

<em>Then the required volume in L= 11.0L</em>

7 0
3 years ago
What is the best source of nuclear DNA when working with hair samples?
horrorfan [7]
Nuclear DNA is present in the nucleus of eukaryotic cells. When working with the DNA samples, the best source of nuclear DNA is hair root that anchors the whole shaft of hair. Hair root possesses cells that are called as keratinocytes.
6 0
3 years ago
Which part of the cell is selectively permeable? Why does it say so?
tresset_1 [31]

Answer:

cellular membranes

Explanation:

Cellular membranes are selectively permeable because they allow only certain molecules to cross into and out of the cell. The phospholipid bilayer is a selectively permeable membrane that surrounds all biological cells. The movement of molecules across the cell membrane bilayer can occur by passive transport (does not require energy) or active transport (requires energy). For example, water molecules pass passively through the cell membrane (passive transport), while other molecules pass through transmembrane proteins against a concentration gradient (active transport).

5 0
3 years ago
How is dna the basic of life?
Allushta [10]


DNA is considered the molecule of life because it contains the instructions that ensure the continuity of life. Employment of DNA to code for protein is the basis of all life on earth. 

In all living things, inherited DNA  is used to code for amino acids  which when joined or linked together in a deliberate specific  manner form polypeptides which make up proteins. These proteins are responsible for  structure and function of cells. 

For example DNA provides information to make  four polypeptide (two beta and two alpha ) chains  which make up hemoglobin, the protein that functions as the oxygen carrier in red blood cells. In summary,

DNA → protein →  trait, and that relationship is the physical basis of life.


6 0
2 years ago
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