A mutation is the change in the sequence of a nucleotide or in the organization of the DNA (genotype) of a living being, which produces a variation in the characteristics of this and that is not necessarily transmitted to the offspring. It occurs spontaneously and suddenly or by the action of mutagens. This change will be present in a small proportion of the population (variant) or of the organism (mutation). The genetic unit capable of mutating is the gene, the unit of hereditary information that is part of DNA.
In multicellular beings, mutations can only be inherited when they affect the reproductive cells. A consequence of mutations can be, for example, a genetic disease. However, although in the short term they may seem harmful, mutations are essential for our long-term existence. Without mutation there would be no change, and without change life could not evolve.
The definition of mutation from the knowledge that the hereditary material is DNA and the proposal of the double helix to explain the structure of the hereditary material (Watson and Crick, 1953), would be that a mutation is any change in the sequence of nucleotides of DNA. When this mutation affects a single gene, it is called a gene mutation. When it is the structure of one or more chromosomes that is affected, chromosomal mutation. And when one or several mutations cause alterations in the whole genome they are called genomic mutations.
the art or practice of garden cultivation and management.
The correct answer would be, Threat and Challenge.
A stressor would be appraised as a Threat if someone anticipates that it could lead to some kind of harm, loss, or other negative consequences; however, if someone believes that it carries the potential for gain or personal growth, it would be appraised as a Challenge.
Explanation:
A Stressor is something that causes pain, stress, strain or tension to someone. There could be a lot of stressors that we experience in our lives. Some of those are:
- Death of a closed or loved one
- Termination of Job
- Divorce or Break up
- Financial set backs, etc.
So if a stressor leads to some kind of harm, loss or other negative consequences in someone's life, it would be considered as a threat. For example if someone has a breakup and he is in deep stress and starts to consume alcohol frequently, then this stressor would be considered a threat.
Similiarly is a stressor lead to some kind of gain or personal growth, it would be appraised as a challenge. For example, if someone's mother dies, and she wanted him to become doctor, then this stressor will act as a challenge for him and he will work hard to fulfill his mother's wish and thus the stressor would be appraised as a challenge.
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Being located in the very middle of Indus River and the Ghaggar-Hakra River, this city had a perfect location in between two major river routes. The city was one of the largest urban centers of the Harappan civilization. Its location allowed it control over the commerce that inevitably used these rivers to transport goods in the region. Also, it provided the city with a source of fresh water and since back then the ridge where the city was located was elevated over the river to avoid its flooding, the location was both located at an important crossroads of river navigation but also protected from natural elements. Thus, it was a hub of commerce, art and a complex social organization.
They were a house for the pharaohs so that when they ''come back to life'', they would have a place to stay before they're ''taken to heaven'', and did you know they used to bury all their possessions with the body. And also for beauty.<span />
