Answer;
Antibodies.
The human immune system fights infection by releasing antibodies.
Explanation;
The immune system acts to defend the body against pathogens such as viruses, bacteria and fungi that may cause a disease.
It does so using various types of mechanism, one is by the production of antibodies.
Antibodies are proteins that are produced by the B-cell and are used by the immune system to identify and neutralize pathogens.
These antibodies also activates proteins known as complements which assist in the killing of bacteria, viruses and the infected cells.
Answer:
Choose B) B) If conclusion is valid, similar investigations by
other scientists should result in the same
conclusion.
Explanation:
The experiment must maintain internal and external validity, or the results will be useless. When designing an experiment, a researcher must follow all of the steps of the scientific method, from making sure that the hypothesis is valid and testable, to using controls and statistical tests
Answers: 1) swell; 2) decreases .
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<span>A cell that is hypotonic to its environment will begin to <u> swell </u><u /> as its solute concentration <u> decreases </u><u /> .
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The level of organization is plants, coral and water. Water came first.
