Answer: A variable within a scientific experiment is something that is changed (i.e. it varies). There should be only one manipulated variable within a scientific experiment so that the experimenter can be certain it is this variable which causes a pattern in the resultant data, if any exists at all.
Explanation:
I believe the correct answer is:
C. Density-independent factor
Answer:Anaerobic Chemoheterotroph.
Anaerobic bacteria is a bacteria which breaks down its nutrients using carbon dioxide or in the absence of oxygen.
Chemoheterotroph is a bacteria which has the capacity to utilize nutrients in the form of chemicals and it can utilize organic nutrients also.
ANAEROBIC CHEMOHETEROTROPHS ARE BACTERIA WHICH FEEDS ON BOTH INORGANIC AND ORGANIC NUTRIENTS IN THE ABSENCE OF OXYGEN OR THE PRESENCE OF CARBON DIOXIDE.
Explanation:
Below are the choices:
(1) a nucleus
<span>(2) a chromosome </span>
<span>(3) a protein molecule </span>
<span>(4) an enzyme molecule
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In the nucleus. However since chromosomes are in the Nucleus they contain the <span>DNA a cell needs to survive. This is why it is in the Nucleus.
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