A) A textbook definition would be that genetic drift is: a random change in allele frequency caused by a series of chance occurences that cause an allele to become more or less common in a population. In layman's terms, this means that genetic drift happens when luck makes the genetic pool of the population to deviate from what is expected.
B) The cause for this genetic drift is the aformentioned couple. Because amish communities are small and they select partners from their community, having even a couple of carriers of alleles in a community can make the allele freuency much larger than expected; for example, if the community was 100 persons, the percentage would be in the order of 1%, still much larger than the general population. Thus, the cause here is that a small population had a couple of carriers.
C) Sexual reproduction leads to a mixing of alleles from both mother and father and helps diversity. When a population is isolated, the gene pool is fixed and no new genes can come in, reducing diversity. Also some people that have an allele might die, hitting diversity even more. Finally, having a small population creates a strong pressure in some circumstances that leads to elimination of some traits and diversity.
Answer: Acid rain is a product of the <u>chemical reaction of sulfur dioxide and nitrogen oxide that is released with water, oxygen, and other chemicals into the atmosphere.</u> <u>Sulfur dioxide and nitrogen oxide dissolve in water and can be carried several miles by the wind</u>. After traveling for a long distance,<u> the two compounds become part of rain, sleet, snow or fog.</u> <u>Power plants emit sulfur dioxide and nitrogen oxide when fossil fuels such as coal are burned to produce electricity.</u> Aswell as <u>the exhaust from cars, trucks, and buses releases sulfur dioxide and nitrogen oxide into the air.</u>
Biomes
Explanation:
The most comprehensive ecological unit of the biosphere is the biomes.
Biomes are the largest ecological unit of life.
- They are made up of different population, communities, ecosystems of living organisms and their environment.
- A biome is an ecosystem made up of common characteristics in the environment they are found.
- They have internal regularities in the nature and types of fauna and flora found in such areas.
- Examples of biomes are tundra, rainforest, desert etc
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Rainforests brainly.com/question/3995505
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Answer:
C. rising moist air
Explanation:
for the storm to start/process it needs the moist air in order for both hurricanes and thunderstorms to happen, because the rotation with the moistness creates the storms.
Hope this helps
Answer:
8
Explanation:
There are originally 8 but 4 of them are the most common known ones.
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