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Elanso [62]
3 years ago
14

Which of the following must a scientific idea be? Select all that apply. ((NO LINKS))

Biology
1 answer:
melamori03 [73]3 years ago
8 0
I think it is repeatable, testable, observable
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Form a Hypothesis: As the map shows, the sickle cell allele is not found in African populations that are native to southern Afri
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A hypothesis for this observation might be that malaria is not endemic to southern Africa. It is a plausible explanation of a given scientific question.

<h3>Hypothesis and scientific method</h3>

A hypothesis is a plausible explanation of an observation of the natural world, which must be tested by using the scientific method.

Testing a hypothesis involves performing additional observational and/or experimental procedures in order to confirm or reject this assumption.

In this case, the sickle cell allele is found in high frequency in regions where malaria is endemic.

Learn more about hypotheses here:

brainly.com/question/11555274

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2 years ago
Pepsinogen is produced by __________ and is activated by __________
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Answer:

Pepsinogen is produced by chief cells and is activated by hydrochloric acid secreted by parietal cells.

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Pepsinogen is a proenzyme produced in the chief cells (that are located in the stomach lining) that, when gets activated, is transformed into pepsin - a peptidase with the function to degrade proteins into amino acids.

The reason why pepsinogen is released inactive is that it would break down all of the cell's proteins because of its proteolytic nature. For this reason, it is released as a proenzyme and gets activated when reaches the acidic environment provided by the hydrochloric acid secreted by the parietal cells, also in the stomach lining.

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It should be D. Hope it helps.
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