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Afina-wow [57]
3 years ago
9

What is a thery that has been proven true over time and and never disproven called

Biology
1 answer:
DaniilM [7]3 years ago
8 0
That is a scientific Law


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What purpose would a scientists need to extract DNA?
fiasKO [112]

Answer:

if someone were to commit a crime and there were 3 leads and one piece of evidence, the 3 people would have to be extracted of some dna and so would the piece of evidence, and the person that matches the dna on the evidence would be tied to the crime

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From where did the carbon in all living things come?
-Dominant- [34]

Answer:

Option B, It was made in stars that lived before the solar system formed.

Explanation:

Almost all the carbon that exists today with in the living organisms was produced in the stars. When these stars exploded during the big bang theory all the carbon within hem was introduced in the environment of earth some billions of years ago. Hence , though carbon introduced in earth’s environment was due to big bang, its origin is from the stars. Hence option B is the correct answer

Cyanobacteria is responsible for generation of oxygen on planet earth and thus option D is in correct.

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Which of the following is a likely effect of the tornado on the plains ecosystem?
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Flying debris could harm a population of bison

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My answer is c
arlik [135]
<span>C.
has strong legs for running

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8 0
3 years ago
During the ________ stage, the placenta is expelled from the uterus.
Taya2010 [7]
Hello there.

Question: <span>During the ________ stage, the placenta is expelled from the uterus.

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