Why Does Malaria Persist in the Human Population

question 4

Multiple Choice

Why does malaria persist in the human population?

• A) Too few humans have died of malaria to end the disease.
• B) Multiple phenotypes survive in a balanced polymorphism.
• C) Malaria is a recessive disease and few humans contract it.
• D) Humans are protected from the malaria parasite.
• E) Malaria is under stabilizing selection. In an environment where malaria is present, the heterozygote is favored.

---

Definitions:

Programming Terminal

A combination of keyboard and monitor used to insert, modify, and observe programs stored in a PLC.

Preventive Maintenance

Scheduled maintenance activities designed to prevent equipment failures before they occur.

I/O Field Devices

Input/Output devices located in the field of an automated system that directly interact with the physical process, such as sensors and actuators.

Output Module Fuse

A safety device in an output module of a PLC or control system designed to protect the module and connected devices from overcurrent by breaking the circuit if the current exceeds a certain threshold.