Science, asked by saptarshighosh21, 10 months ago

16. Organ systems which are exposed to external environment are protected from bacteria

by presence of ___________.

a)mucus membrane
b)HCl
c)hairs
d)plug

Answers

Answered by amarpreetkaur1317

3

the answer is a) mucus membrane

Answered by 16MonksS

0

Answer:

SALT HELPS US TO PREVENT OURSELF FROM BACTERIA thats b hcl

Explanation:

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