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Mechanisms for recognizing kin are found throughout the plant and anim

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New post 13 Jul 2013, 06:28
Hi Prapon ,

For question 6 , the option E i.e The mechanisms operate differently in different species even when they serve exactly the same function also seems perfectly fine . Could you please explain the reasoning behind Option b ?Thanks in advance !
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New post 25 Sep 2014, 21:31
Everyone,

I have posted the official explanations for all the questions. Just click "reveal" to view them.

Good luck!
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Tough 700+ Level RCs: Passage1 | Passage2 | Passage3 | Passage4 | Passage5 | Passage6 | Passage7
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New post 26 Sep 2014, 08:35
PrashantPonde wrote:
Everyone,

I have posted the official explanations for all the questions. Just click "reveal" to view them.

Good luck!



Thanks! Good to see you back!
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New post 22 Oct 2014, 06:52
Got all correct. 15 mins.
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New post 14 May 2018, 07:34
Can someone please explain Q4?

"A" makes sense. I just couldn't eliminate "C".

I thought 4C says that it lends support to what's mentioned 2nd paragraph which is this:
The fact that this bacterium is more deadly when it comes from a close relative with a similar immune system suggests that natural selection may favor cannibals that avoid such pathogens by not eating kin.

Why is C wrong?
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New post 16 Oct 2018, 10:39
Q2 :

i dont agree with OA :B
passage - that occasionally one tadpole eats another or eats a freshwater shrimp. This event CAN trigger changes in the tadpole’s physiology and dietary preference, causing the tadpole to become larger and exclusively carnivorous

2. The passage states which one of the following about some spadefoot toad tadpoles?
(A) They develop the ability to recognize fellow carnivores.- the cannibals have a procedure of discrimination whereby they nip at( they bite first and then recognize related tadbole) other tadpoles, eating non-siblings but releasing siblings unharmed. This shows the abiity to recognize fellow carnivores. - Ther are still too many errors in this AC: We dont know if this ability is inherent or developed later. How closely CANNIBAL characterisics resemble TADPLES not sure.
(B) They feed only upon omnivorous tadpoles.
(C) They change in body size when they become carnivores.- why wrong? 1. there is a probability mentioned and this AC makes a generalised statement. 2. There is no correlation or causation mentioned to say "they change in body size WHEN they become carnivores"
(D) Their carnivorousness constitutes an important piece of evidence that calls into question the inclusive fitness theory.
(E) Their carnivorousness would not occur unless it contributed in some way to the evolutionary success of the spadefoot toad species.

Why cant we make an inference here?
The passage states which one of the following about some spadefoot toad tadpoles? -- we are asked to find " what the passage STATES" so this has to be directly deductible from passage... rewording is allower but extra info nope.

If my reasoning is wrong please correct me
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New post 08 Jan 2019, 03:16
23 minutes, 5/8 correct. Can someone please help me with Q5? Option A says 'does not solely rely on visual clues'. This means that the tadpole has sight and uses visual clues. But nowhere in the passage is it mentioned that the tadpoles can see. They might be blind, sensing their surroundings through some other mechanism. Option A assumes that the tadpoles have sight.

Help is greatly appreciated. THanks!
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Re: Mechanisms for recognizing kin are found throughout the plant and anim   [#permalink] 08 Jan 2019, 03:16

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