The answer is <span>A. Decrease in genetic variation
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A founder effect is a result of a geographical separation of a few individuals from the original population. Those few founding individuals will form a new population so they are founders. In this new population, there will be present alleles of the few founding individuals. However, those few founding individuals do not represent a whole genetic variation of the old population, but only some part of it.
Imagine a population of fish in which there are yellow, green, blue, and red colored fish. In the population, there is a genetic variation. But, if a few green-colored and red-colored fish geographically separate from the population and form a new population, in the new population there will be decreased genetic variation (because there are only green and red fish compared to the old population where are fish in 4 different colors).</span>
A potential cancer-causing gene coding for a protein with cell cycle control responsibilities is a carcinogen, and a gene coding for a protein that stimulates cell division is a proto-oncogene.
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What is carcinogen?</h3>
- Anything that has the potential to cause cancer is a carcinogen.
- They fall into three main categories: oncogenic (cancer-causing) viruses, physical carcinogens, and chemical carcinogens (including those derived from biological sources).
- The majority of carcinogens, either alone or in combination, cause cancer by interacting with cell DNA and impairing healthy cellular function.
- As a result, a tumour (an abnormal tissue development) eventually develops.
- Tumors have the capacity to spread (metastasize) from their original sites, invade, and cause dysfunction in other tissues, leading to organ failure and death.
- The two main ways that carcinogens cause these tumors to develop are through DNA changes that promote cell division and stop cells from being able to self-destruct in response to common triggers like DNA damage or cellular injury (apoptosis).
- There are substances known as carcinogens that cause cancer by means of non-genotoxic processes such immunosuppression and the development of tissue-specific inflammation.
To learn more about carcinogen, refer to brainly.com/question/984334
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Answer:
The bimetallic strip is made of two metal strips, stuck together. One of the metals expands much more than the other when they are heated. This causes the strip to bend.
Explanation:
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Answer and Explanation:
Biogeographic distribution is the large-scale geographic pattern in the distribution of species, and the causes and history of this distribution. The evolution of analogous structures is called convergent evolution which occurs due to different organisms exploiting the same environment.
The ancestors of modern mammals arose in the northern hemisphere and migrated in three major directions before the drift. Separation of the continents isolated the animals bringing about different patterns of evolution.