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Eva8 [605]
3 years ago
14

Skin is able to prevent most microorganisms from entering the body by

Biology
1 answer:
Goshia [24]3 years ago
8 0
The structure of the skin is an effective barrier against bacteria. The multiple layers of epidermis, while can be invaded by foreign organisms, has a high turnover rate which means it is constantly shedding, therefore even the bacteria is shed protecting the body. Lastly, the skin's lipids maintain an acidic pH which slows and stops growth and replication of bacteria.
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Describe in detail the process of Natural Selection / Evolution.
saveliy_v [14]

Natural Selection is the process by which the most adapted, or fittest, species survive and the least adapted, or unfit, species do not survive. An example of Natural Selection is if there are two species of birds that eat the same thing, but one of the species has a beak that makes it harder to eat the food, naturally the species that has the beak fit to eat that food will survive. The species that is not fit to eat that food will either adapt or will be unable to survive. Evolution is a species adapting to the enviornment over a period of time. There is microevolution and macroevolution.

6 0
2 years ago
What type of mutation occurs when a nucleotide is added to the DNA?
Yanka [14]

Answer:

A frameshift mutation.

Explanation:

A frameshift mutation is when one adds an extra nucleotide to a series of nucleotides. This will mess up the order of the nucleotide, thus when it forms the codons, and eventually, the amino acids; all of the codons are wrong, thus all of the amino acids are wrong.

In this situation, an extra nucleotide is added to a sequence of DNA, this results in all of the other nucleotides getting pushed over by (1). Thus, all of the nucleotides form the wrong codons and the wrong amino acids. Therefore, a frameshift mutation has occured.

4 0
2 years ago
Behavior can best be defined as
sertanlavr [38]

Answer:

Behavior is best defined as anything a person says, does, or feels.

7 0
2 years ago
Cells are sometimes called
Vlad1618 [11]

Answer: The cell is the structural and functional unit of all living organisms, and is sometimes called <u>the "building block of life."</u> Some organisms, such as bacteria, are unicellular, consisting of a single cell.

6 0
2 years ago
"46. The largest number of neurons within the brain and spinal cord are _____; they are responsible for the central nervous syst
Whitepunk [10]

Answer:

INTERNEUTRONS

Explanation:

INTERNEUTRONS

Interneutrons are really the highest number of neurons and spinal cord. They are accountable for the diverse communication system of the nervous system and try and resolve between inputs and outputs.

Interneurons are groups of nerve cells commonly found in nervous system integrative areas where axons & dendrites are restricted to a specific area of  brain.

3 0
3 years ago
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