Acidic solutions have pH of less than 7. Neutral have pH of 7. Basic solutions have pH higher than 7.
1 hormones
2 external stimuli
When molecules are being transported opposite to the molecules concentration gradient.
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Answer:
sister chromatids separate and begin to move towards the pole of the cell during anaphase.
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(HIV) the virus that causes acquired immunodeficiency syndrome (AIDS) in serum, saliva , or urine such tests may antibodies, antigens, or RNA .