Answer:
an advantage is living cells can be examined in their natural state without previously being killed, fixed, and stained
The answer is Nutrients the plant needs
The answer is D. ...................................................
Answer:
immune system
Explanation:
The adaptive immune system reacts specifically to pathogens (germs). It is able to recognize attacking pathogens and fights against certain antigens or foreign substances. The next time a known antigen is encountered, the adaptive immune system can respond faster.