Question

5. Which of these act as natural barriers to invasions?
i. The Great Himalayas
ii. The Great Indian Desert
iii. Coastal plains
iv. All of these

Answer 1

Answer:

The Great Himalayas is the correct answer

Answer 2

Answer:

Natural Barriers

Usually, the skin prevents invasion by microorganisms unless it is damaged (for example, by an injury, insect bite, or burn). Mucous membranes, such as the lining of the

mouth, nose, and eyelids, are also effective barriers.