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avanturin [10]
3 years ago
13

The PCV is determined using A. whole blood with no anticoagulant added. B. plasma only. C. serum only. D. whole blood with an an

ticoagulant added.
Biology
1 answer:
Svetllana [295]3 years ago
5 0

The correct answer is option D, that is, whole blood with an anticoagulant added.  

The PCV or the packed cell volume determines the proportion of red blood cells present in the whole blood. It is one of the various tests, which may be used to diagnose or monitor a condition known as anemia. The test may also be used to diagnose or monitor a rare kind of blood cancer called polycythemia.  

The PCV can be determined by centrifuging heparinized blood in a capillary tube at 10000 RPM for 5 minutes. This distinguishes the blood into layers. The volume of the packed RBCs divided by the total volume of the blood sample provides the PCV.  


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Given the names of these three enzymes proteases, DNase, RNase what reaction do you expect each one to catalyze
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As the name suggests, proteases will be the enzymes which will catalyze the reactions of proteolysis. Proteolysis can be described as the process of breaking proteins into amino acids and simple peptide bonds.

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3 years ago
1. How would the predation of pythons on rabbits affect the population of other large predators such as bobcats and alligators?
Inessa [10]

Q1:

Answer:

Studies have reported that due to predation of pythons on rabbits, the population of other predators is badly affected.

Bobcats are a natural predator of rabbits thus they come in a competition with pythons for food. As pythons are more powerful so they target rabbits more easily than Bobcats. The population of Bobcats has been declined by 90% or more due to the establishment of pythons in the Everglades.

<em>Alligator mississippiensis </em>or American alligators are also abundant in Everglades and just like Bobcats they compete with pythons for their food. They can even kill pythons if pythons are smaller in size than them, but python will kill alligator if he is of smaller size. Although rabbits are food for both alligator and Python but Alligator is a key stone specie and it has very important ecological role, because it digs holes in land that retain water upon rainfall. These water hole provide water in the extreme dry weather and help in survival of other small specie like insects and birds.

So, we can expect the population of Alligator, Bob cats and other small insects and birds to decline rapidly if Python population kept on increasing with same speed.

-------------------------------------------------------------------------------------------------------------

Q2:

Answer:

There is no doubt that Pythons pose serious threat for both humans as well as survival of other organisms like Alligators and birds. However, I donot think that “Python challenge” is a reasonable way to kill or remove Pythons. Because It can threat the lives of many individuals who take part in competition, although they are trained but still they are nor professionals and get training of only few weeks so it is not safe competition.

There should be some strategy of introducing natural predators like Brown beers, Cougars and Alligators which can kill python naturally without staking the life of humans at risk.


Hope it helps!

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