Individuals who are heterozygous for the sickle-cell allele suffer less from the attack of malaria because a small percentage of the red blood cells are sickle-shaped. They are more resistant to malaria than individuals who have two copies of the normal haemoglobin allele. Heterozygous individuals have a better chance of surviving and reproducing in regions where malaria is prevalent since they do not fully contract the disease.
Answer is (c). They move from higher concentration to lower one . This is called diffusion.
Answer:
The answer to your question is, DNA provides instructions to cells in forming an organ.
To increase the novelty of Life.