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Andrews [41]
3 years ago
5

How many independent variables can be tested in a standard scientific experiment?

Biology
2 answers:
lianna [129]3 years ago
7 0
<span>The only way to test a particular variable for sure is to leave all other variables constant, and if a change in ONE variable creates an overall change, then you know that that variable caused it. But if you change 2 variables, and something changes, you don't know which one changed it for sure. </span>
m_a_m_a [10]3 years ago
7 0

Answer:

Only 1 variable

Explanation:

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Answer:

D. Discovered chemolithotrophs in natural enviroments.

Explanation:

Sergei Winogradsky was a russian microbiologist. He observed in his research with genus of bacteria <em>Beggiatoa, </em>they were able to oxidize hydrogen sulfide as an energy source. Being the first example known of lithotrophs (organisms that use inorganic substrate in order to obtain energy).

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Answer:

The endoderm gives rise to the nervous system.

Explanation:

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According to the research, all of the following are typical physiological effects of dehydration except <u>osmolality decreased</u>.

<h3>What is dehydration?</h3>

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Among the most frequent effects are thirst, osmolality increases, increased sweat rate, dry skin and fatigue.

Therefore, we can conclude that according to the research, all of the following are typical physiological effects of dehydration except osmolality decreased.

Learn more about dehydration here: brainly.com/question/12261974

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