Heat convection is a mode of heat transfer by the mass motion of a fluid such as air. Heat convection occurs to the surface of an object where the surrounding fluid of object is heated and moved energy away from the source of heat.
Answer
The 4 events that occur during amoeba are:-
- It sees the food particle.Then by pseudopodia (the finger like projections from amoeba) traps the food particle.
- The finger-like extensions of the cell surface fuse over the food particle forming a food vacuole.
- Inside the food vacuole, complex foods are broken down into simpler ones which then diffuse into the cytoplasm.
- The remaining undigested material is moved to the surface of the cell and thrown out. [Egestion].
Answer:
In an individual's molecular and cellular level, the heterozygote alleles are preferred over the homozygote alleles. In humans, the heterozygote alleles are found at a locus of beta polypeptide subunit of hemoglobin, while on the other hand, the homozygous alleles found at a similar locus are prone to sickle cell disease.
The individuals carrying homozygous alleles exhibit sickle-shaped RBCs and they also possess low oxygen-carrying capacity, which ultimately results in brain, kidney, or heart failure. However, in the case of heterozygous alleles, the configurations of RBCs are of two kinds, that is, normal shaped and sickle-shaped. Thus, there are not enough sickle-shaped cells to result in the condition.
The heterozygote alleles are resistant to malaria, thus, in tropical areas, where malaria is a prime issue the heterozygote alleles are preferred over the homozygote dominant alleles as they are vulnerable to the infection and over the homozygote recessive alleles who has sickle cell disease.
Other reasons are
Not finishing the antibiotics.
Or
Taking antibiotics too often
