Answer:
D. Polymerase chain reaction
Explanation:
PCR is very percise; used to amplify or copy a specific DNA target from a mixture of DNA molecules by:
- two short DNA sequences (primers) are bind to start and end the DNA target
- perform the PCR; DNA templates is added to a tube that contains primers, free nucleotides, and the enzyme (DNA polymearse)
- it is mixed in a PCR machine that increases and decreases the temperature of the sample
- mixture is heated to seperate the double strnaded DNA templated into single strands
- mixture is cooled so the primers can bind to the DNA template
- the DNA polymerase will synthesize to new strands of DNA from the primers
- during synthesis, the end of the first cycle, the DNA molecule will consist of a new and old DNA strand
- PCR continues with added cycles to repeat the steps
- newly synthesized DNA segements serve as templates in later cycles; which can be copied over and over.
ANSWER: RED AND HOT
EXPLANATION: The area surrounding the injury is expected to red and hot.
However, the justification of area being “red and hot” is because of the initial activities of Mario after the incident that caused the laceration.
Thus, Mario stopped the bleeding by holding pressure on it, and this in turn caused the redness and hotness of the area surrounding the laceration.
<u>Answer:</u>
Natural: mountains, rocks, soils, ecosystems, etc.
Manmade: artificial streams or tributaries, roads, farms, etc.
<u>Explanation:</u>
A watershed a geographical area that drains all forms of surface water (rainfall or snowmelt) from <u>higher altitudes</u> (e.g. top of mountains) to the <u>lower altitude</u> (e.g. rivers) thus draining the water to the same place.
Since watershed is a large area, it often comprises both natural and manmade features. Manmade features are typically the roads or (small) cities that are developed by humans in the hilly areas. On the other hand, natural features are developed due to the natural action of hydrogeological and/or meteorological conditions over the course of longer time periods.
C and a i’m pretty sure sure!
Although cells are diverse, all cells have certain parts in common. The parts include a plasma membrane, cytoplasm, ribosomes, and DNA. The plasma membrane (also called the cell membrane) is a thin coat of lipids that surrounds a cell.
Hope it helps ^^