Answer:
20 feet blood vessels and 1000 nerve endings
Explanation:
The skin is the largest organ of the body and is composed of three layers that are epidermis, dermis and the subcutaneous layer. The outer layer is the epidermis consisting of cells that are tightly packed in around in 20 layers. The middle thick layer is the dermis that consist of glands, nerves, blood vessels, and hair follicles that provide skin its functions. The inner layer is the subcutaneous that is composed of connective tissue and fat.
The square inch of skin consist of 20 feet blood vessels, 1000 nerve endings, 650 sweat glands and 100 oil glands. The blood vessels supplies blood to the tissues and the nerve endings upon stimulation sends signals to the brain and generate response depending on the kind of stimulus like heat, pressure, pain, or temperature.
Answer:
Insulin is one example of a protein that acts as a hormone.
Explanation:
it causes changes throughout the body as it is transported through the bloodstream, this is what makes insulin a hormone.
The Afrikaners are an example of a founder effect that occurs when population and the random decrease in genetic variation is an example of genetic drift.
Explanation:
When some individuals from a population move to form a new colony, this phenomenon is called founder effect as in case of Afrikaners. The small population or group of individuals forming a new colony may not exhibit the full genetic diversity of the population they were once the part.
The alleles would get expressed in different frequencies than it would have in original population.
There are chances that some alleles are lost or missing also. The new colony formed has small population so chances of genetic drift are very strong.
Genetic drift does not depend upon the benefit or harmful effect of the alleles as it occurs merely by chance sampling. The small population of Afrikaners felt the effect of genetic variation hence strong genetic drift is seen in them.
Answer:
In the most general case of x bases and y bases per codon, the total number of possible codons is equal to xy .
In the case of the hypothetical Martian life-forms, is the minimum codon length needed to specify 17 amino acids is 5 (25 = 32), with some redundancy (meaning that more than one codon could code for the same amino acid). For life on Earth, x = 4 and y = 3; thus the number of codons is 43, or 64. Because there are only 20 amino acids, there is a lot of redundancy in the code (there are several codons for each amino acid).
Explanation: