Answer: P-waves are known as congressional waves and S-waves are known as secondary waves.
Explanation:
Gamates cells have half the chromosomes
The leading cause of death is Suicide. An odd answer but that's what it says.
Answer:
Unavailability of biological agent.
Explanation:
The main cause of this problem is the unavailability of biological agent for that insects in that environment. biological agents are the organisms that controls other insects population by feeding on them. When a new insect is introduced in a particular environment and no bioagent is present for it, it greatly damaged the crops and destroys the field of the farmer.