Answer:
1) Sterilize the loop.
2)Flame lip of TSS culture with <em>S. aureus</em>.
3) Remove some bacteria from surface of TSS culture with <em>S. aureus.</em> Remove loop.
4)Flame lip of TSS culture with <em>S. aureus</em>.
5)Flame lip of broth culture tube.
6) Dip loop into sterile TSB and swirl. Remove loop.
7)Flame lip of broth culture tube.
8) Sterilize the loop.
Explanation:
The aseptic technique is a s<u>eries of steps to prevent contamination during manipulations of cultures and sterile culture media</u>. A mastery of aseptic technique is required for maintaining pure cultures, as airborne contaminants are virtually everywhere. Picking an isolated colony and restreaking it is the main method for obtaining pure cultures from liquid samples containing several different organisms and is a common procedure in the microbiology laboratory. Other techniques for obtaining pure cultures have been developed that are especially suited for particular groups.
5. It is difficult to diagnose genetic conditions because they are rarely seen and once problems start presenting themselves not only would a diagnosis need to be made. But to prove it you would have to take blood from both parents to see why they together could produce genetic conditions.
6) Down syndrome occurs when you get a smaller number of chromosomes you are supposed to inherit from each parent during conception.
7) a silent mutation is a change in DNA but does not changes the encoded and has no phenotypic effect therefore the genetic sequence is not changed
Answer:
The correct answers are options B, D and E.
Explanation:
One of the essential parts of the innate immune system is the complement system. This system performs an essential function in elevating the tendency of antibodies and phagocytic cells to eliminate the pathogens. There are three biochemical pathways, which instigate the complement system that comprises the classical, alternative, and lectin complement pathway.
The fundamental activities of the complement system are opsonization, cell lysis, chemotaxis, and agglutination. The process of cytolysis takes place through the complement pathway by the generation of membrane attack complex in the raiding cells. The complement pathway also leads to inflammation.
If the choice is true or false, the answer is true. Most of hominins were probably nearly as efficient at bipedal locomotion as humans. However, the bones of their pelvis were shorter from top to bottom than humans. This made their pelvis more stable for weight which supports standing upright or moving bipedially.
Answer:
B. The <em>pituitary</em> gland
Explanation:
Can't be the ovaries, they're down by the hips!
Can't be adrenal glands, they're on top of the kidneys!
Can't be the thyroid, that's low on the front of the neck or something like that!
It's B, the pituitary; it's on the base of the brain.
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