Question

2.1.1
State any TWO ways to avoid contracting malaria.
2.1.2
2.1.3
2.1.4
What is a vector?
(1)
Which genus is the vector for the malarial parasite?
(1)
Describe how the malaria parasite is passed from one person to
another.
Explain how an increase in the number of malaria infections would
affect the South African economy.
Suggest ONE way in which the data about the number of infections
may have been collected.
2.1.5
(2
2.1.6
2.1.7
Give ONE reason why the number of infections might have been
more than the estimated 7 000 in the year 2005.
TOTAL SECTION B
GRAND TOT​

Answer 1

Answer:

State any TWO ways to avoid contracting malaria:-

Bite prevention – avoid mosquito bites by using insect repellent, covering your arms and legs, and using a mosquito net. Check whether you need to take malaria prevention tablets – if you do, make sure you take the right antimalarial tablets at the right dose, and finish the course.

Which genus is the vector for the malarial parasite?

answer:- Human malaria is transmitted only by females of the genus Anopheles. Of the approximately 430 Anopheles species, only 30-40 transmit malaria (i.e., are “vectors”) in nature. The rest either bite humans infrequently or cannot sustain development of malaria parasites.

What is a vector?

answer:- In molecular cloning, a vector is a DNA molecule used as a vehicle to artificially carry foreign genetic material into another cell, where it can be replicated and/or expressed (e.g., plasmid, cosmid, Lambda phages). ... A vector containing foreign DNA is termed recombinant DNA.

Describe how the malaria parasite is passed from one person to:-

answer:- Usually, people get malaria by being bitten by an infective female Anopheles mosquito. Only Anopheles mosquitoes can transmit malaria and they must have been infected through a previous blood meal taken from an infected person.