Chemical barrier
Sweat, tears, mucus, and saliva break down and destroy pathogens. There are chemicals in the body excretions that are breaking down pathogens.
Seed banking is one of the most efficient methods used in biotechnology and genetics wherein a seed is stored in a "bank" in order to preserve its genetic information. The procedure is important because the risk of a plant species getting endangered would be minimised.
Answer:
A i think
Explanation:
big side is 4...1+3 is 4 and to form one the 2 small sides have to be greater than the big side
Answer:
B is the answer. I hope this is helpful :)