They may depend on PH of the water, nutrients, and sunlight.
Answer:
An experiment that directly test the hypothesis.
Explanation:
Although there is quite a bit missing from Mary's scientific investigation, the thing that sticks out the most is the fact that Mary is missing an experiment. Mary's hypothesis states that people would fall asleep faster if their room color were to be painted blue. To prove that her hypothesis is true, Mary would need to conduct an experiment to see whether or not she was correct.
After hundreds or even thousands of generations both alleles for sickle cell anemia are still common in those of African ancestry. This is supported by two mechanisms: heterozygote advantage and gene flow.
Heterozygote advantage
When an allele is said to be heterozygous, it is carrying one copy of a gene. For example if one carries a copy of sickle cell allele, it will stay in the population even after many generations — natural selection will not be able to remove it and it will be passed on through generations. So, having one copy of that allele is advantageous but not deleterious.
Gene flow
With humans migrating throughout the different parts of the world, sickle cell allele is passed from one person to another or in different populations. It is actually advantageous to have one copy of this allele especially if there’s malaria in the area, which the allele is resistant.
Vestigial because they don't use it but it's still there
Answer:
A) The middle-of-the-road style
Explanation:
The middle-of-the-road leadership style is plotted in the center of the grid and shows balanced concern for production and people. Employees are neither satisfied nor dissatisfied with their jobs, and their performance is average.
It should be adequate in all four management areas :
1) Interpersonal skills.
2) Intrapersonal skills.
3) Executive abilities.
4) Leadership potential.
hence option A) The middle-of-the-road style is the right choice.
