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An MC question of biology in HKCEE

Eskimos live in the Artic regions. Their diet is rich in fat because

A. fat is a good insulator of heat.
B. they hunt polar animals for food.
C. the energy value of fat is higher than that of carbohydrate.
D. they alimentary canal is adapted for digesting fat.
Reply 1
Avatar for tiggerish
tiggerish
B?

It's a bit ambiguous, A and C explain why they would hunt polar animals, B explains the source of the fat, all of which can be used to answer a "because" question. Then again, your body can convert excess carbs into body fat for storage and insulation. Argh. I don't know, but I think B, because A and C are both one of a kind, D is wrong, so by process of elimination...

EDIT. Hmm, just read on another forum that it's actually C.

How does the question enable you to make that decision though? We all know that fats contain more energy than carbs, but are eskimos making a conscious decision to eat fats instead of carbs? Are there even carbs available in the arctic regions?

I feel very stupid now.
Reply 2
Avatar for littlebee2
littlebee2
Is that really a question from an HKCEE paper? Its a bit ambiguous just like the poster above said. I would of said C but that is only because i would think that would be an answer wanted from a biology paper but the question i find wasn't worded very well and so therefore there was a few possibilities.
Reply 3
Avatar for jessieja
jessieja
OP
The answer is B
Reply 4
Avatar for tiggerish
tiggerish
How do you know?
Reply 5
Avatar for jessieja
jessieja
OP
Due to the extreme climate of the Arctic regions, crop growing in this area is impossible. Hence, the main source of food of Eskimos is polar animals. These animals usually contain plenty of fat, so Eskimos' diet is rich in fat.

A and C are incorrect as they are the significances of the phenomenon rather than the cause of it, so the answer is B.

(By HKCEE past papers solution)
Reply 6
Avatar for tiggerish
tiggerish
I'm correct. Yay.

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