D: All the variables are controlled except one.
Answer:
A) species diversity tends to increase as a result of ecological succession.
Explanation:
The correct answer would be D) An observation that has a number associated with it.
Nucleus, The “brains” of the cell, the nucleus directs cell activities and contains genetic material called chromosomes made of DNA.
Answer:
influenza struck (sick) patient
new patient comes into contact with sick patient.
sick patient sneezes
new patient inhales through nose
new patient is infected
Explanation:
