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Ksivusya [100]
3 years ago
9

Which factor of the genetic code makes organisms different from one another?

Biology
2 answers:
zhenek [66]3 years ago
7 0
B: The order of the codons
tatiyna3 years ago
5 0

Answer:

The correct answer would be the order of the codons.

The nucleotide sequence of DNA (deoxiribonucleic acid) is the main factor which makes organisms different from each other.

This sequence is decoded into the codon sequence of mRNA (messenger RNA) which ultimately decides the amino acid sequence of a polypeptide.

This protein decides the phenotype of an organism. Different phenotype (like skin color, eye color, tall and short) make organisms different from each other.

Thus, we can say that order of the codons makes organisms different from one another.

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3 years ago
At what point do the pulmonary and systemic circulation systems meet up?
Hitman42 [59]

Answer: The Heart

Explanation:

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There are two types of blood circulatory system in the human body, which are connected: The systemic circulation provides organs, tissues and cells with blood so that they get oxygen and other vital substances. The pulmonary circulation is where the fresh oxygen we breathe in enters the blood. At the same time, carbon dioxide is released from the blood.

Blood circulation starts when the heart relaxes between two heartbeats: The blood flows from both atria (the upper two chambers of the heart) into the ventricles (the lower two chambers), which then expand. The following phase is called the ejection period, which is when both ventricles pump the blood into the large arteries.

In the systemic circulation, the left ventricle pumps oxygen-rich blood into the main artery (aorta). The blood travels from the main artery to larger and smaller arteries and into the capillary network. There the blood drops off oxygen, nutrients and other important substances and picks up carbon dioxide and waste products. The blood, which is now low in oxygen, is collected in veins and travels to the right atrium and into the right ventricle.

This is where pulmonary circulation begins: The right ventricle pumps low-oxygen blood into the pulmonary artery, which branches off into smaller and smaller arteries and capillaries. The capillaries form a fine network around the pulmonary vesicles (grape-like air sacs at the end of the airways). This is where carbon dioxide is released from the blood into the air inside the pulmonary vesicles, and fresh oxygen enters the bloodstream. When we breathe out, carbon dioxide leaves our body. Oxygen-rich blood travels through the pulmonary veins and the left atrium into the left ventricle. The next heartbeat starts a new cycle of systemic circulation. Below is an attachment of a diagram that explains the connection between pulmonary and systemic circulation from google.

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3 years ago
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Hope this helps :)

Explanation:

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