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3 years ago

Which of these would not be a VALID scientific theory?

Biology

2 answers:

valina [46]3 years ago

8 0

B, as far as we know humans aren't from space

julsineya [31]3 years ago

4 0

Answer: B Humans originated on earth from outer space.

Explanation:

A scientific theory can be define as the explanation for a phenomena which naturally occur. It is supported and verified by using observatory approach and using appropriate scientific methodology required to obtain the results which are expected to prove the facts.

B Humans originated on earth from outer space. is not a valid scientific theory this is because of the fact that on the basis of many proposed scientific theories and literature the human species was originated on earth and not from the outer space.

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3 years ago

Anna has been studying a type of bacteria that triples every month. Originally, there were 4 bacterial cells. She wants to know

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Answer:

$a(15)=4(3)^{15}$

Explanation:

Given,

Original number of bacterial cell = 4,

Also, the number of bacterial cell triples every month,

So, the number of bacteria after one month = 3 × 4 = 4(3)

After two months = 3 × 4(3) = 4(3)²,

After three months = 3 × 4(3)² = 4(3)³,

......................................................... , so on,

Thus, the number of bacterial cell after 15 months,

$a(x)=4(3)^x$

For 15 months, x = 15,

Hence, the number of bacterial cells after 15 months,

$a(15)=4(3)^{15}$

Which is the required equation she should use.

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The answer is C.
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