Biology 2013ers MARATHONN (5 Viewers)

[Menomaths]

My mistake. Yeah I think I worded the question too weirdly. What I did mean was:

Explain why research into the production of artificial blood is required..

So similar to the original question -.-'

 

[ocatal]

So similar to the original question -.-'

It is but it isn't :L The original leaned more towards how the research has impacted scientific understanding whereas the other one is about why there is research into it in the first place.

 

[leesh95]

There are many reasons why we continue to research into artificial blood, it has many advantages over donated blood
-there is a lack of donations
-Artificial blood does not require any bloodtype matching
-Can be stored for longer periods of time, and does not have to be kept in the fridge
-is free of infections, and other risks (aka completely sterile)
-eg perflurocarbins

there are also inadaquacies in artificial blood right? what are they?

HBOC's --> Disintegrate into dangerous free radicals and monomers and dimers that can damage the kidney upon excretion
Disrupt certain physiological functions
PFC's --> Have to be emulsified before use
Can cause flu like symptoms
Overall artificial blood so far can only carry out the oxygen distribution function of blood whereas normal blood has several other important functions in relation to that.

 

[ocatal]

HBOC's --> Disintegrate into dangerous free radicals and monomers and dimers that can damage the kidney upon excretion
Disrupt certain physiological functions
PFC's --> Have to be emulsified before use
Can cause flu like symptoms
Overall artificial blood so far can only carry out the oxygen distribution function of blood whereas normal blood has several other important functions in relation to that.

Good work! Also PFC's, although they can carry a lot of oxygen, they can't release it.

 

[ocatal]

Explain the significance of booster injections in the application of vaccines.

 

[abdog]

Which of the following results in an increased absorption of water from the collecting
tubule of the nephron?
A. An increase in the length of the collecting tubule
B. A decrease in ADH released into the blood by the pituitary
C. A decrease in glucose moving from the renal tubule into capillaries
D. An increase in the concentration of dialysate solution in renal dialysis

 

[abdog]

How does a plant respond in order to keep cool on an extremely hot day?
A. It grows smaller leaves.
B. It opens stomata in the leaves.
C. It grows more hairs on the surface of the leaves.
D. It decreases the number of stomata on the top of the leaves.

 

[Menomaths]

A?

edit: for first mc

 

[abdog]

A?

edit: for first mc

Yeah its A. Reason? Because I don't think the collecting ducts can increase in length(not really sure)

 

[Menomaths]

Yeah its A. Reason? Because I don't think the collecting ducts can increase in length(not really sure)

Animals that live in a desert, such as kangaroo's tend to have longer collecting ducts than those that live in conditions in which there isn't much water availability. The longer the duct the more area there is exposed which results in more re-absorption.

 

[leesh95]

Animals that live in a desert, such as kangaroo's tend to have longer collecting tubules than those that live in conditions in which there isn't that much dryness. The longer the tubule the more area there is exposed which results in more re-absorption.

Collecting tubule or loop of Henle?

 

[leesh95]

How does a plant respond in order to keep cool on an extremely hot day?
A. It grows smaller leaves.
B. It opens stomata in the leaves.
C. It grows more hairs on the surface of the leaves.
D. It decreases the number of stomata on the top of the leaves.

Ans:B
All others are adaptations to reduce water loss.

 

[obliviousninja]

Isn't it just because theres a greater surface area for which water can be absorbed?

Woo. I got 2 MC right. State rank, here I come.

 

[obliviousninja]

Ans:B
All others are adaptations to reduce water loss.

By opening stomata, internal temperature is cooled as water is evaportated

 

[Menomaths]

Collecting tubule or loop of Henle?

both

 

[leesh95]

By opening stomata, internal temperature is cooled as water is evaportated

Yes that's right.

 

[leesh95]

Assess the reliability and validity of Mendel's experiments.

Discuss the impacts of the changing methods of dealing with plant and animal diseases.

 

[leesh95]

Compare the movement of substances through the xylem and phloem vessels of a plant

Outline the roles of Sutton and Boveri in identifying the importance of chromosomes

Outline the process used to produce transgenic species including one example

 

[Menomaths]

Assess the reliability and validity of Mendel's experiments. his experiments were reliable and valid as he repeated his experiment numerous times keeping exact track of his results mathematically. He also experimented on the many characteristics of pea plants such as shape, height etc (not sure if that's validity)

Discuss the impacts of the changing methods of dealing with plant and animal diseases.

Emphasis is shifting from cure to prevention in dealing with plant and animal diseases. Preventing a disease from occurring is much better than curing it as a disease which has occurred can cause permanent damage and can also spread throughout a population. Due to vaccinations, quarantine etc(methods that prevent a disease from occurring) there's been a reduce in plant diseases and animal diseases, eg. foot and mouth disease.

edit:just highlight if you can't read the yellow

 

[leesh95]

Emphasis is shifting from cure to prevention in dealing with plant and animal diseases. Preventing a disease from occurring is much better than curing it as a disease which has occurred can cause permanent damage and can also spread throughout a population. Due to vaccinations, quarantine etc(methods that prevent a disease from occurring) there's been a reduce in plant diseases and animal diseases, eg. foot and mouth disease.

edit:just highlight if you can't read the yellow

Did you write that from memory? I envy you. Good job.