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# Vervet monkey use different alarm calls to warn each other

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[#permalink]  05 Oct 2006, 20:07
muddypaws wrote:

as for C, a predator ( as in singular) with dual attack capabilities cannot attack from air and land at the SAME time.

That's not necessarily true. How about attacks from other "flying monkeys" ??
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[#permalink]  05 Oct 2006, 20:51
OA is D ...we have insightful explanations in this thread

Btw, it's Mid-autumn festival in several parts of the world now ( Mainly in China, Vietnam, Malaysia, Singapore, Korea) so let's savor some mooncakes, sip cups of tea and fancy the roundest Moon of the year
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[#permalink]  05 Oct 2006, 22:24
laxieqv wrote:
OA is D ...we have insightful explanations in this thread

Btw, it's Mid-autumn festival in several parts of the world now ( Mainly in China, Vietnam, Malaysia, Singapore, Korea) so let's savor some mooncakes, sip cups of tea and fancy the roundest Moon of the year

Hi laxieqv

are you from one of the country mentioned above ?

Happy Mooncake Festival...~
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[#permalink]  05 Oct 2006, 22:26
I'm in the first, from the second and will be in the third

So you're in Taiwan?!! ...Happy Mid-autumn day to you!! ^^
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[#permalink]  06 Oct 2006, 07:01
Damn they look yummy Laxie !! Have one for each one of us
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[#permalink]  06 Oct 2006, 09:06
Clear D, though C also looks like an option.

The need for distinct calls is to alert the other monkeys to take appropriate cover. So, while C explains that there are either land based or air based predators, it does not explain the rationale to distinguish between the two.
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Re: Vervet monkeys use different alarm calls [#permalink]  28 Sep 2012, 10:29
getgyan wrote:
Vervet monkeys use different alarm calls to warn each other of nearby predators, depending on whether the danger comes from land or from the air.
Which one of the following, if true, contributes most to an explanation of the behavior of vervet monkeys described above?

A. By varying the pitch of its alarm call, a vervet monkey can indicate the number of predators approaching.
B. Different land-based predators are responsible for different numbers of vervet monkey deaths.
C. No predators that pose a danger to vervet monkeys can attack both from land and from the air.
D. Vervet monkeys avoid land-based predators by climbing trees but avoid predation from the air by diving into foliage.
E. Certain land-based predators feed only on vervet monkeys, whereas every predator that attacks vervet monkeys from the air feeds on many different animals.

I was quite confused between C and D, ended up choosing D as D shows what actions other monkeys can take.
Probably it is an extension of C.
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Re: Vervet monkeys use different alarm calls [#permalink]  28 Sep 2012, 22:56
vivekdixit07 wrote:
I was quite confused between C and D, ended up choosing D as D shows what actions other monkeys can take.
Probably it is an extension of C.

Hi Vivek

Why do you think D is an extension of C?

Option C is an assumption of the stimuli but what is asked here is the reason which contributes most to an explanation of the behavior of vervet monkeys described above, which is done most effectively by Option D. Dont you think so?

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Re: Vervet monkeys use different alarm calls [#permalink]  29 Sep 2012, 09:15
aditi1903 wrote:
getgyan wrote:
Vervet monkeys use different alarm calls to warn each other of nearby predators, depending on whether the danger comes from land or from the air.
Which one of the following, if true, contributes most to an explanation of the behavior of vervet monkeys described above?

A. By varying the pitch of its alarm call, a vervet monkey can indicate the number of predators approaching.
B. Different land-based predators are responsible for different numbers of vervet monkey deaths.
C. No predators that pose a danger to vervet monkeys can attack both from land and from the air.
D. Vervet monkeys avoid land-based predators by climbing trees but avoid predation from the air by diving into foliage.
E. Certain land-based predators feed only on vervet monkeys, whereas every predator that attacks vervet monkeys from the air feeds on many different animals.

is the answer C?
i dont believe in D because it unnecessarily gives an insight on how the monkeys save their lives.
Option C instead answer the behaviour of the monkeys reasoning WHY THEY HAVE TWO ALARMs.
the statememnt says: "Vervet monkeys use different alarm calls to warn each other " ,Here DIFFERENT is the catch word.
Wats d answer?

+1 D

Answer choice C mentions the characteristic or rather weakness of the predators by saying that no predators who pose a danger to vervet monkeys can attack both from land and air. There is no indication that because of the predator's mentioned incapability the velvet monkeys develop such behaviour.

On the other hand, answer choice D mentions that velvet monkeys develop such behaviour (use different alarm calls for land and air predator) to avoid the predator by climbing trees if land based predator and by diving into foliage if air based predator. Hence 'D' is the correct answer.

Press Kudos if you like my explanation
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Re: Vervet monkeys use different alarm calls to warn each other [#permalink]  08 Jul 2013, 15:13
D easy. IMO ,Seems a little too straightforward for a 700 level question.
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Re: Vervet monkeys use different alarm calls to warn each other [#permalink]  08 Jul 2013, 22:47
amardeep03 wrote:
Vervet monkeys use different alarm calls to warn each other of nearby predators,
depending on whether the danger comes from land or from the air. Which one of the
following, if true, contributes most to an explanation of the behavior of vervet monkeys
described above?

a) By varying the pitch of its alarm call, a vervet monkey can indicate the number of predators
approaching.
b) Different land-based predators are responsible for different numbers of vervet monkey
deaths.
c) No predators that pose a danger to vervet monkeys can attack both from land and from the
air.
d) Vervet monkeys avoid land-based predators by climbing trees but avoid predation from the
air by diving into foliage.
e) Certain land-based predators feed only on vervet monkeys, whereas

On another Day with other choices C could well be the answer Bravo. One more shot at 800.

D is the correct answer.

Last edited by Narenn on 09 Jul 2013, 10:54, edited 1 time in total.
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Re: Vervet monkeys use different alarm calls to warn each other   [#permalink] 08 Jul 2013, 22:47
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