Answer:E. Down-regulation
Explanation:Cells typically up or down regulate depending on the concentration of a hormone levels. When there is a excessive concentration of a hormone in the blood stream, the cell decreases the number of receptors reducing the interaction with that hormone, Also, when there is excessive hormone reduction, the target cells activate to increase their number of receptors.
Down regulation occurs by the the deactivating or degrading of target cells to reduce the number of receptors due to their sensitivity to a particular excess hormone.
Answer:
There are all kinds of different forms of soil around the world, and they have different features. Just a side note dirt is only soil when there is fertility and life in the dirt. Darren is able to measure the mixture of, clay, silt, and sand to identify the soil sample.
Explanation:
Answer:
Well you have to tell the child that genetics is the study of how traits(characters) are passed on from parent to offspring. Such traits include height, weight, facial features etc.
Chromosomes are the cells that carry those traits in the body. Human beings usually have 46 chromosomes but during reproduction, the chromosomes are halved to give 23 which is in its haploid state so that each parent gives 23 chromosomes each to get 46 chromosomes which is the standard number of chromosomes for humans and animals.
Haploid means a single set of these chromosomes donated by the parent during reproduction while the 46 chromosomes which is achieved after reproduction is referred to as Diploid which means 2 set of the chromosomes from both parents.
The correct option is D.
Mining for mineral resources is an intensive task that involves disturbing and disrupting the lands where the minerals are found. The process of mineral exploration and eventual mining cause great disturbances to the affected land and one of the damages done to such land is great increase in soil erosion.
A geneticist describes the phenotype of an individual with the alleles dd as homo-zygous recessive. In heterozygous individuals, it is masked by the dominant allele.
<h3>Dominant and recessive alleles</h3>
In diploid organisms, an individual receives two gene forms or 'alleles' for the same gene locus.
An individual is heterozygous when receives two different alleles for the same gene locus, whereas an individual is homo-zygous when receives the same alleles for a gene locus.
In cases of complete dominance, the dominant allele completely masks the recessive allele in heterozygous individuals.
Learn more about recessive alleles here:
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