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Vikki [24]
3 years ago
10

This diagram shows that embryos of certain species develop almost identically in the earliest stages of embryonic development. T

hese physical similarities indicate that there are also genetic similarities among these organisms. The physical and genetic embryological similarities among these organisms suggest that they A. descended from a common ancestor. B. have multiple vestigial organs in common. C. are members of the same genus. D. hunt and breed in similar habitats.
Biology
1 answer:
umka21 [38]3 years ago
6 0
The correct option is A.
The observation that the embryos of certain species have physical and genetical similarities in the earliest stages of embryonic development shows that individual development of an organism shows its revolutionary history and this is taken as an evidence of common ancestry. Scientists takes this observation to mean that all life on earth developed from a single ancestor.<span />
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Extreme cold conditions can freeze the tissue layers of the parts of the skin exposed like those of the face, hands and feet especially. Due to this the skin becomes white (even grayish yellow or blue) and waxy, cold and numb, and the outer surface may become hard and blistered. There will also be extreme pain, stinging and tingling sensation in the exposed areas.  

These changes are mainly due to impaired blood circulation and hypothermia. Hypothermia which is lowering of body temperature causes confusion and lethargy.

The first-aid given for frostbite primarily includes warming the body. The affected person’s body should be covered with warm and dry blankets gently and loosely and any wet clothes should be removed.  

So when the body is warmed, the body temperature also will increase and correct the hypothermic symptoms like lethargy and confusion.

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