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MissTica
3 years ago
7

What contribution did Jonas Salk make to science in the 1950s?

Biology
2 answers:
victus00 [196]3 years ago
8 0
He basically made the first safe and effective vaccine for the disease Polio
Sergio039 [100]3 years ago
4 0
Jonas Salk made the Polio vaccine.
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Explanation:

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c. Feathers were used as part of a social display

Explanation:

There are many speculations about the origin of feathers, some researchers believe that they emerged as a specific function, others defend the idea of the emergence of feathers from a social display.

The social display may have been one of the factors for the origin of the feathers, since in addition to the conquest of the female, animals thus selected would gain more conducive conditions for survival, such as better regulation of body temperature. But social display alone could not have forced the emergence of more complex feathers, since in many cases sexual characters usually occur only in males and not in females, or less apparent in females.

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1. True or False Flatworms are known as acoelomates.
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which of the following is a true statement about skepticism? A. it is not a useful part of science and should be eliminated. B.
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