One adaptation to life in flowing water is - breeding in oceans
Adaptation is not a quick process but rather it is a slow and time taking process. It can be defined as an evolutionary process where an organism becomes increasingly well suited to living in a particular habitat. It is a feature of an organism that enables it to live in a particular habitat.
Answer:
flies because frogs eat flies
Explanation:
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:
Option-B
Explanation:
Dysentery is an abnormal condition that is caused by the infection of the intestine in humans. The infection could be caused by the bacteria or the amoeba.
The disease can be characterized by the cramps in the stomach, diarrhea, and the loss of blood through feces.
Untreated dysentery can lead to the loss of a large amount of blood through feces and will lower the amount of blood in humans.
This severe loss of blood will give rise to another disease called hypovolemic shock is which the heart fails to pump enough blood to the organs due to which the other organs of the body can fail to work properly. This condition can lead to death.
Thus, Option-B is correct.
