Answer:
B. differential
Explanation:
The culture medium is a chemical preparation that has the necessary nutrients for microorganisms of a given biological sample to multiply, allowing its study, identification and analysis. The main components of a culture medium are sources of carbon, energy (sugars), nitrogen, phosphorus and minerals.
There are several types of culture medium, among them we can mention the differential culture medium, which is the type of medium that is being used in the experiment shown in the question above. The differential culture medium allows the distinction between various genera and species of similar microorganisms. This distinction is possible because this type of culture medium has substances that allow for a presumptive differentiation, evidenced by the color change or the morphology of the colonies.
Answer: The correct answer is nucleotide.
Explanation:
Nucleic acids are the polymer of nucleotides which are attached with each other with the help of phospho-diester bonds.
Nucleotide consists of sugar (ribose in RNA and deoxyribose in DNA), phosphate group, and nitrogenous base (A, T, G, and in DNA; and A, U, G, and C in RNA).
Answer:
The four- chambered hearts of birds and mammals are best described as <u>homoplasies.</u>
Explanation:
In evolution, homoplasies are the trait shared in different species despite that their ancestors didn't have it at all. In other words, these are traits that can be gained or lost during evolution in different lineages independently. For example, wings of birds and wings of bats do the same function (help in flying) but they were not there in the ancestors so both animals developed these structures independently.
In the given example, birds and mammals have four-chambered heart but their ancestors have 3 chamber hearts. They evolved independently and developed 4 chamber heart. This might be due to several reasons. However, their ancestors didn't have the feature so it is an example of homoplasy.
Mitosis simply refers to cell division in which one cell divides and produce two new cells that are identical.
Here are the steps:
(1) Prophase
<span>(a) Early prophase when cells starts to break down some structures and build others up. It sets up the stage when the chromosome is dividing.</span><span>(b) Prometaphase, mitotic spindle begins to capture and organize the chromosomes.
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(2) Metaphase
<span>The spindle has captured all the chromosomes. They lined them up at the middle of the cell making it ready for division.
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(3) Anaphase
<span>The sister chromatids separate from each other and are pulled towards opposite ends of the cell.
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(4) Telophase
<span>The cell is nearly finished dividing, and it starts to re-establish normal internal structures as cytokinesis takes place.</span>
Question:
To code for the operating microscope, what verbiage are you looking for in the medical record?
(a)loupes were donned for magnification
(b)microdissection may be necessary
(c)due to the intricate dissection under magnification
(d)the operating microscope was steriley draped and brought into the surgical feild
<u>Answer</u>:
Option D: The operating microscope being sterilely draped and brought into the surgical field.
<u>Explanation:</u>
The loupe present is for the single vision magnifying glass, that can be frequently seen with the gold smith and with the watchmakers. The operating microscope are the binocular microscope through which small intricate parts can be observed during repairing of the watches etc. It is used in the surgery for observing the blood vessels as well as the nerves. This instrument can never be sterilized so after the use, it should be properly wrapped sterilely and kept inside the operation room.
