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Cardiovascular system provides individual cells with oxygen and nutrient which helps in disposing metabolic wastes.
Answer:
option D
Explanation:
In the process of surgically removing one person,s brain, there is a very high chance that a completely clean cut is not made during this procedure generating scarred nerve tissue which is the inability of nerve tissue to heal properly; scarred nerve tissue also do not transmit signals well. And these neurons do not renew themselves. They do not divide at all. Due to the fact that loss of neurons is usually permanent and the nervous system can permanently lose some of its abilities.
Antibiotic resistance in bacteria is an example of natural selection.
Explanation:
Antibiotic resistance in bacteria occurs when bacteria do not respond to the antibodies, chemical and drugs required to treat the bacterial infection.
The resistant mutant bacteria will survive the antibiotic action and would pass on this trait to its offspring. This passing of survival trait is the example of natural selection in the process of evolution.