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Ksivusya [100]
3 years ago
12

Through which of these medias do sound travel most slowly a.water b.wood c.iron d.air

Biology
2 answers:
rjkz [21]3 years ago
6 0
Water.
Sound travels slowly because the amount of pressure.
barxatty [35]3 years ago
5 0
The answer will be “a” water
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Which statement is best supported by the data in the graph? A graph entitled Number of people living with H I V, number of peopl
galben [10]

The graph is not given in the question and options are also not clear, so the required graph is attached below and the clear options are also given below:

Which statement is best supported by the data in the graph?  A graph entitled Number of people living with H I V, number of people newly infected with H I V and number of AIDS deaths worldwide from 1990 to 2008 in millions is shown. Year is on the horizontal axis and number of people is on the vertical axis. The number of people living with H I V steadily increases over the years. The number of people newly infected increased from 1990 to 1996 and then began to decrease. The number of deaths due to AIDS increased from 1990 to 2002, and then began to level off and decrease.

A. Since 2000, there has been an increase in the number of people living with HIV, but a decrease in the number of people newly infected with HIV.

B. Since 1990, both the number of new HIV infections and the number of deaths due to AIDS has consistently increased

C. The life span of a person living with HIV has become shorter.

D. Twice as many people were living with HIV in 2008 than in 2000.

 Answer:

A. Since 2000, there has been an increase in the number of people living with HIV, but a decrease in the number of people newly infected with HIV.

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According to the data shown in the graph, since 2000, the people living with HIV has been increased, but a decrease in the number of people newly infected with HIV.

The reason behind this can be early screening of the infection since 2000 and awareness among people decreasing the infection rate as well.

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Answer:

Mirrors are essential to every home. They help us in our daily mundane lives, though we rarely ever really appreciate their usefulness. From the moment we get up at night to the time we ready ourselves for sleep, we almost always seek for a mirror to take a look at ourselves. Mirrors reflect to us how we look, how clothes fit us, and how things fit.

Explanation:

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Normally, this region is imprinted in the sperm, but not the egg. This means that the DNA on the ____________ copy of the chromo
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Explanation:

Chromosomes are DNA structures associated with proteins such as histones. They are found in the nucleus of cells and contain genetic information for the development and functioning of an organism. Human beings are diploid, meaning that they possess two copies of each of the 23 chromosomes (a total of 46).

Gametes, which are sex cells such as the sperm (produced by the male) and the egg (produced by the female) that are haploid. This means that they possess only one chromosome of each pair. During fertilization, a male gamete fuses with a female gamete to generate a zygote, which will give rise to a new human being. <u>This new individual will possess half of the genetic material from its father and half from its mother. Thus having a total of 46 chromosomes, 23 from each parent</u>.

Genetic imprinting modulates gene expression by chemical modification of DNA and/or modification of chromatin structure. Often, genetic imprinting causes a gene to be expressed only on the chromosome inherited from one of the parents. One example of imprinting is DNA methylation, which is a process by which methyl groups are added to DNA. <u>Methylation modifies DNA function when found in the promoter gene, repressing gene transcription. This means that a methylated gene will not be expressed</u>, that is, it will not produce a protein encoded by that gene. So, if a region of DNA is imprinted in the sperm cell, the paternal chromosome inherited from this sperm will be methylated in the genes of the offspring. And the offspring will only express the maternal copy inherited, which will not be methylated.

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