Answer:
B) The normal pH of blood is 6.8 to 7.0.
Explanation:
The blood pH under normal health conditions is between 7.35 and 7.45. Below this range, blood pH is considered more acidic than normal, and it may indicate that the body is eliminating a lower amount of 
than normal, or that there is a decrease in the concentration of 
or accumulation of acid in the blood due to poisoning or disease.
Answer: A scientific question can be answered through an investigation. What is tested? Scientists call this an independent variable.
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B.
I'm pretty sure because, chemicals and pesticides can easily make insects more immune. So therefore the average pesticides will no longer work on them but also some may not be affected by the solutions.
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When populations have differences in rituals or behaviors. When populations are separated by rivers, mountains, r bodies of water.
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Answer: Chromosome
The polynucleotide DNA strands are wrapped on circular proteins called histones which then are condensed into a structure called chromosome.
