Question

(D) Rhizopus and Lactobacillus
The main barrier that prevents the entry of micro-organisms into our
body is
(A) Antibodies
(B) Macrophages
(C) Monocytes
(D) Skin
Nematode specific genes were introduced into the tobacco host plant using
a vector
(A) PBR 322
(B) Plasmid
(C) Bacteriophage
(D) Agrobacterium

Answer 1

Answer:

The main barrier that prevents the entry of micro organisms in our body is Skin

The outer layer of skin is dead which is called as st. corneam.

Nematode specific gene introduced in tobacco plant by using Agrobacterium tumefacian.