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tangare [24]
3 years ago
12

There are two types of digestive system. frous other parts are the story

Biology
1 answer:
prisoha [69]3 years ago
3 0

Answer:

There are two kinds of digestion: mechanical and chemical. Mechanical digestion involves physically breaking the food into smaller pieces. Mechanical digestion begins in the mouth as the food is chewed. Chemical digestion involves breaking down the food into simpler nutrients that can be used by the cells.

The interior walls of the small intestine are tightly wrinkled into projections called circular folds that greatly increase their surface area. ... All of these wrinkles and projections help to greatly increase the amount of contact between the cells of the mucosa and chyme to maximize the absorption of vital nutrients.

The digestive system works very closely with the circulatory system to get the absorbed nutrients distributed through your body. The circulatory system also carries chemical signals from your endocrine system that control the speed of digestion.

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The cell cycle includes four phases-- G1, S1, G2, and M. What occurs during the S phase?
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In S phase, the cell synthesizes a complete copy of the DNA in its nucleus. It also duplicates a microtubule-organizing structure called the centrosome.

Explanation:

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3 years ago
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1.) spindle fibers and centrioles form

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Meiosis is important because it ensures that all organisms produced via sexual reproduction contain the correct number of chromosomes. Meiosis also produces genetic variation by way of the process of recombination.

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3 years ago
Which of the following errors would result in a negative result for all samples in an ELISA (including positive controls)? Selec
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Answer:

All errors described will result in a negative result

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The enzyme-linked immunosorbent assay (ELISA), is a test used to detect and measure antibodies, antigens and proteins in the blood. An ELISA test uses antibodies and/or antigens that are coupled to an easily-assayed enzyme, thereby this approach combines antibody specificity with the sensitivity of simple enzyme assays. ELISA test involves an antibody or antigen that reacts to form an antigen-antibody complex, where such reaction is interpreted as a positive result. The negative results are evidenced by the lack of reaction, which may be caused by some error during the chain of reactions in the ELISA test: antigen >> primary antibody (reaction) >> functional secondary antibody (reaction) >> conjugated enzyme (reaction) >> functional substrate.

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2 years ago
What is the most important part of the DNA molecule?
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The main parts of a nucleotide are the nitrogenous base and sugar-phosphate backbone. A viable nucleotide can't form without them. Thus, they both have equal importance.

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3 years ago
Is the muzzle velocity a scalar or vector quantity? Please explain your decision.
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