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Marina CMI [18]
3 years ago
11

A child is born with curly hair like her mother's and blue eyes like her father's. Why does the child have these features?

Biology
1 answer:
OLEGan [10]3 years ago
5 0
If a child is born with curly hair like their mother and blue eyes like their father, it is all due to genetics. That parents DNA carries certain genes which are passed on to the child. This includes things such as hair color, eye color, hair texture and even certain illnesses. 
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zaharov [31]

Robin can have a ddt concentration of 444ppm while the ddt concentration of soil is 10 ppm. This happens due to biological magnification.

<u>Explanation:</u>

In biological magnification the concentration of toxic substances at successive trophic levels keeps increasing. Due to biomagnification, what starts out as a small concentration grows  while moving to successive trophic levels. DDT is a pesticide which is used to kill pests that affect crops.

DDT used in farms gets deposited in the soil. From the soil it can reach various trophic levels. At each trophic level its concentration keeps increasing.

Robin is a bird that is a secondary consumer and thus belongs to the higher trophic level. Thus even if the DDT concentration is as low as 10ppm in the soil its concentration will keep increasing and can become a high value like 444ppm.

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