Answer:
The question is incomplete as options was not given. Here is the complete question:
Which phrase does not describe a way the human body responds to fight disease?
(1) destruction of infectious agents by white blood cells
(2) production of antibodies by white blood cells
(3) increased production of white blood cells
(4) production of pathogens by white blood cells
Explanation:
Answer is option 4, PRODUCTION OF PATHOGENS BY WHITE BLOODS CELLS.
During the fight against diseases by human, the white blood cells otherwise called leukocytes are involved in the protection of the body against infectious agents and pathogens, do not produce more pathogens rather antibodies to fight against the invading pathogens.
There is increased production of white blood cells during infection by pathogens, the infectious agents are destroyed by the white blood cells and the production of antibodies against the pathogens.
Answer:
The statement is true
Explanation:
The phosphate group in the sugar-phosphate backbone contains a negative charge on the oxygen atom which gives the DNA its overall negative charge. This negative charge on DNA in helpful in the coiling or packaging of DNA around the positively charges histone protein.
This negative charge property of DNA is used in electrophoresis to separate the DNA according to their charge and size. In electrophoresis, the negatively charged DNA is attracted towards positive poles and is separated according to their charge and size. Therefore the statement is true.
Answer:
False
Explanation:
The process of primary succession can take hundreds, if not thousands, of years. In contrast, the process of secondary succession can reestablish an ecosystem's climax communities in as few as 50 years. The ecosystem's animal populations are also established more quickly during secondary succession.
Hope this helps!
Brain-List?
Answer:
<u>The ocean absorbs nitrogen gas from the atmosphere. In open-ocean areas with low concentrations of nutrients (“oligotrophic” regions), some of this nitrogen is taken up by microbes and transformed into various chemical compounds</u>
