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zheka24 [161]
3 years ago
13

True or false, dr. jonas salk developed a vaccine for typhoid fever.

Biology
2 answers:
Nezavi [6.7K]3 years ago
8 0
Hello there,
False. <span>The British bacteriologist </span>Almroth Edward Wright<span> first developed an effective typhoid vaccine at the Army Medical School in Netley, Hampshire.

Hope this helps :))

~Top
</span>
nlexa [21]3 years ago
7 0

Answer:

the answer is polio

Explanation:

just answered it

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Anna007 [38]

The options for this question are:

- Requires genetic variation

- Results in descent with modification

- Involves differential reproductive success

- All of the above

Answer:

<u><em>The correct option is d) All of the above</em></u>

Explanation:

The theory of natural selection explains that genetic variations occur in organisms of a species. Those organisms which are better adapted to live in an environment are able to survive and pass on their characteristics to their offsprings, hence descent with modification. Through this phenomenon, evolution takes place with the passage of time. Natural selection favours survival of the fittest. Hence, all of the above statements are true.

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Which of the following situations best describes the use of a renewable resource?
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The best answer to the question stated above is <span>Building wooden furniture.

>Renewable Resource are </span><span>resource which are replaced naturally and can be used again.
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3 years ago
The amount of matter that cycles through a food web
kari74 [83]

the correct answer is A

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What is a toxic thing to eat
krek1111 [17]

Answer:

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Explanation:

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What does the term electron orbital describe?An electron orbital describes the orbit of an electron around the nucleus.An electr
AlekseyPX

The correct answer is B. An electron orbital describes a three-dimensional space where an electron can be found 90% of the time.

Explanation:

Electrons are negatively charged particles found in atoms. These different from protons and neutrons are not located in the nucleus of the atom but orbit it. Additionally, electrons do not orbit the nucleus following a linear pattern but they have a wave-like behavior which means they move in a three-dimensional space or area known as electron orbital in which they can be found most of the time, this space of area is determined depending on energy, momentum, and other factors. Thus, an electron orbital is "a three-dimensional space where an electron can be found 90% of the time".

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