Multiple choice (2 Viewers)

[C-BAS]

After going through it briefly with my teacher I know I got the first one wrong. I put A grrrrrrr

But the rest I think I got. So probably 14/15 for me.

 

[andrewt_ss]

Hey guys,

9 B (C means Carbon dioxide dissolves to make carbonic acid, BAD)

What do you guys think?

Answer is C. CO2 stays as HCO3- ions in the blood.

 

[Sarah182]

Hey guys,
I got:
1 C (A makes different combination of Alleles)
2 B (Anthrax)
3 B (Simple)
4 C (The word quarantine)
5 C (Text book answer)
6 C (Simple)
7 A (100 - (30x2) /2 )
8 B (Must be Bb allele's for a girl to be bb allele)
9 B (C means Carbon dioxide dissolves to make carbonic acid, BAD)
10 A (Simple, 2nd dot point)
11 D (B means that stomates closed at midnight, whats the need?)
12 C (Simple)
13 B (T-Cells will try to fight the foreign antigen???)
14 D (Best answer and signifies rapid change)
15 D (B is too much of an assumption and D seems the "best" answer)\


What do you guys think?

I think 4 is A because that involves both isolating the diseased animals (so they don't infect the others) and then vaccinating the others which would be the best way to prevent the spread I thought.

And for 9 CO2 only binds weakly when it forms carbaminohaemoglobin (if it binded strongly more would be carried in this form) but like 8% can be transported as dissolved CO2, so C?

Discuss.

 

[cheechthecheech]

Hey guys,
I got:
1 C (A makes different combination of Alleles)
2 B (Anthrax)
3 B (Simple)
4 C (The word quarantine)
5 C (Text book answer)
6 C (Simple)
7 A (100 - (30x2) /2 )
8 B (Must be Bb allele's for a girl to be bb allele)
9 B (C means Carbon dioxide dissolves to make carbonic acid, BAD)
10 A (Simple, 2nd dot point)
11 D (B means that stomates closed at midnight, whats the need?)
12 C (Simple)
13 B (T-Cells will try to fight the foreign antigen???)
14 D (Best answer and signifies rapid change)
15 D (B is too much of an assumption and D seems the "best" answer)
What do you guys think?

i agree cept for 4, which i think is A. C just repeats the question as the sick animals are already in a diff enclosure.

 

[ami8000]

Answer is C. CO2 stays as HCO3- ions in the blood.

And for 9 CO2 only binds weakly when it forms carbaminohaemoglobin (if it binded strongly more would be carried in this form) but like 8% can be transported as dissolved CO2, so C?

1st thing that came through my mind when i saw the question was dont both CO2 and O2 bind weakly to the Haemoglobin.
&
Doesn't the word dissolve have connotations of becoming hydrated by the water in the plasma, so it'll form Carbonic acid. as CO2 + H20 --> H2CO3. Wouldn't HCO3- ions would mean that it ionises? It's a pity we must wait SOOO long for the answers!

 

[andrewt_ss]

1st thing that came through my mind when i saw the question was dont both CO2 and O2 bind weakly to the Haemoglobin.
&
Doesn't the word dissolve have connotations of becoming hydrated by the water in the plasma, so it'll form Carbonic acid. Wouldn't HCO3- ions would mean that it ionises?

CO2 does mix with haemoglobin to make carboxyhaemoglobin..... or something like that. It binds like 28%, but it does not "stongly bind" as the B answer says. CO2 and water make carbonic acid, but most CO2 in the blood is kept as HCO3- ions so it can act as a buffer to keep the pH of blood around 7. In the nephron you're body actively reabsorbs carbonate ions just for that purpose.

 

[nowayitsslush]

xD I got them all right!
That multiple choice was pretty easy.

 

[zazzy1234]

I got
1. C (mutations generate new alleles, whilst crossing over results in new allele combination. completely different).
2. B
3. B
4. A
5. C
6. C
7. A
8. B
9. C (not sure about this, could be B, discuss)
10. A
11. D
12. C
13. B
14. D
15. D

If you got these answers, then your guaranteed 15/15

um u sat for bio too?

 

[Pain]

Hey guys,
I got:
1 C (A makes different combination of Alleles)
2 B (Anthrax)
3 B (Simple)
4 C (The word quarantine)
5 C (Text book answer)
6 C (Simple)
7 A (100 - (30x2) /2 )
8 B (Must be Bb allele's for a girl to be bb allele)
9 B (C means Carbon dioxide dissolves to make carbonic acid, BAD)
10 A (Simple, 2nd dot point)
11 D (B means that stomates closed at midnight, whats the need?)
12 C (Simple)
13 B (T-Cells will try to fight the foreign antigen???)
14 D (Best answer and signifies rapid change)
15 D (B is too much of an assumption and D seems the "best" answer)\


What do you guys think?

14 isn't punctuated equilibrium. Rapid periods of evolution in Punctuated equilibrium refers to THOUSANDS OF YEARS, not just two or so generations. Sorry pal

 

[lolrofllol]

Gotta be D, stomata would close in the hottest time of the day, because it's a plant in a dry environment??

zzz

D shows stomates less than half open during the WHOLE day. Plants can't photosynthesise with stomates half open. B shows them open during half the night (For respiration) and in early morning and dawn (to avoid midday heat but gain sunlight for photosynthesis).

meh whatever

 

[Solano17]

14 isn't punctuated equilibrium. Rapid periods of evolution in Punctuated equilibrium refers to THOUSANDS OF YEARS, not just two or so generations. Sorry pal

I agree 100% ive been trying to argue this to my teacher

 

[tiffuneez]

9 B (C means Carbon dioxide dissolves to make carbonic acid, BAD)

I agree and thought that too

 

[jkdsfsio3458963]

I agree 100% ive been trying to argue this to my teacher

so your saying its divergent evolution involving gradualism, which takes longer than thousands of years. D is the best answer.

 

[jkdsfsio3458963]

Hey guys,
I got:

4 C (The word quarantine)

i agree with answer C for 4. In a question about the quarantine dot point, they're not looking for an answer that involves vaccination, that was to throw people off. They were asking you to provide a solution to the problem of a disease spreading to another enclosure. If they had a vaccine already, there is no need to stop the disease spreading.

 

[Solano17]

so your saying its divergent evolution involving gradualism, which takes longer than thousands of years. D is the best answer.

BUT the generations are given on the side, and the term "rapid" used when describing punctuated equilibrium refers to 10 000 years. The whole question only deals with 12 generations which deals with 1200 years at best. All im saying is that based on this evidence alone, it cant be D.

 

[Sarah182]

so your saying its divergent evolution involving gradualism, which takes longer than thousands of years. D is the best answer.

Exactly, punctuated equilibrium involves rapid evolution, divergent would have been over 10000 generations.

 

[arjungamer123]

I think 4 is A because that involves both isolating the diseased animals (so they don't infect the others) and then vaccinating the others which would be the best way to prevent the spread I thought.

And for 9 CO2 only binds weakly when it forms carbaminohaemoglobin (if it binded strongly more would be carried in this form) but like 8% can be transported as dissolved CO2, so C?

Discuss.

This is what I thought. This was a real case of "best" answer. A mixed b and C together, so it was the best choice.

 

[jkdsfsio3458963]

what if it's some hardcore rabbit that doesn't mature sexually until its a 1000 years old.

 

[Aplus]

I couldn't stop laughing when I saw question 14, the faces

 

[ST!CKMAN]

just adding my 2cents worth

Question 4 = C (could be A but i'm more inclined with C intense internal debate during the exam lol)
Which procedure would best prevent emphasise on prevent the spread of disease to animals in other enclosures on the farm.
Quarintine is one or vaccination is another. Do they vaccinate animals =\ ? and also vaccinations only work against bacteria. what if the disease had been caused by a protozoan or fungi or a virus ?

Question 14 is D not Divergent! or B

The diagram does not show the conditions or changes in conditions in environment, i agree that there is only a change in over 12 generations
but punctuate equilibrium is "rapid changes" which can mean over thousands of years or by interpretation in this question since only 12 generations are being modeled, over the 12 generations