The answer that i'd go with is A.Sunlight
Hope i helped
The type of mutation that is responsible for sickle cell anemia is substitution
Answer:to be infected,a person must ingest food contaminated with it's egg
Explanation: Ascaris lumbricoides is a parasitic roundworm found in the intestine.It causes Ascariasis.
It is a round enlongated worm which move by contracting it's muscles.
They live in the intestine of their host and sucking in food which they digest.they are able to survive in a region that has low oxygen.
When they are mature,the male and female mate and discharge the eggs in the intestine of the host.these eggs are then expelled along with the host's faeces.
When another host ingest the eggs by food contaminated by it,the larva is released from the egg and continues it's life in the intestine of it's host.it develops into an adult,mates and the cycle repeats itself.
