The ice has less density than liquid water, so it floats on the water surface. Therefore during the winter all the lakes and rivers are frozen only at a top. Deeper layers of water are cold, but still liquid and it allows fish and other organisms to survive. Moreover, the ice cover provides temperature isolation so liquid water beneath the ice has more or less constant temperature (around 4 dgr Celsius)
The answer would be '<span>A.<span>The genes for melanin pigmentation remain turned on and prepare more melanin than usual to protect the skin from photo-damage when it is exposed to sunlight for long time.'
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Answer:
Cancer is essentially uncontrolled mitosis of specialized cells.
Explanation:
As you said, cancer can control in any region of the body. As a matter of fact, a cancerous cell is produced in your body every 30 minutes and your immune system locates and kills it. Cancer is unpredictable and can happen in any specialized cell.
Answer:
74%
Explanation:
The frequency in such cases (diallelic cases) is estimated by following formula which is attached in the image:
So as per our question, the frequency of the "R allele" as per data given below will be as under:
58 red-phase (RR)
32 cross-phase (RS)
10 black/silver-phase (SS) foxes
Total plants = 58 + 32 + 10 = 100
f(R) = 58 x 2 + 32/ 2 (58+32+10)
= 116 + 32 / 200
= 148/200
= 0.74 i.e. 74%
