Answer:
In areas of Africa where malaria is prevalent the number of sickle cell cases remains consistent generation after generation. ---- support the hypothesis.
In Canada the incident of sickle cell anemia has been increasing in the population. ----- contradicts the hypothesis.
Explanation:
In areas of Africa where malaria is widespread the number of sickle cell cases remains consistent generation after generation while on the other hand, In Canada the incident of sickle cell anemia are lower in the population because of environmental condition is not good for increase in malarial disease. In Africa, the environment is suitable for the mosquitoes that causes malaria so there is high increase of sickle cell anemia in the population.
Answer:
If the cell has not properly copied its chromosomes, an enzyme called cyclin dependent kinase, or CDK, will not activate the cyclin, and the cell cycle will not proceed to the next phase. The cell will undergo cell death.
Explanation:
Another difference between the two forces is the fact that gravitation only attracts, while electrical forces attract when the electrical charges are opposite and repel if the charges are similar. Thus, gravitation is considered a mono-pole force, while electrostatics is a dipole force.
Proper sterilization of a culture can be of vital importance for the viewing accuracy of the slide we are preparing.
Sterilizing the loop before picking up the <u>bacterial sample</u> for the smear is, as the question states, making sure that we use the correct aseptic technique. This is of vital importance so that the smear does not get contaminated with cells from the environment.
Allowing the smear to become contaminated will result in cells of <u>different shapes and sizes</u> to be seen on the smear, given that the sample is no longer isolated to just the E.coli we wish to study. This may only bring about health risks by contaminating you or a coworker with whom you may share the workspace.
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Answer:
B. Virus
Explanation:
Once attached to a host cell, a virus injects its nucleic acid into the cell. The nucleic acid takes over the normal operation of the host cell and the host cell produces multiple copies of the virus.