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A certain species of desert lizard digs tunnels in which to lay its eg

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A certain species of desert lizard digs tunnels in which to lay its eg [#permalink]

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The Official Guide for GMAT Verbal Review 2018

Practice Question
Question No.: CR 154
Page:

A certain species of desert lizard digs tunnels in which to lay its eggs. The eggs must must incubate inside the tunnel for several weeks before hatching, and they fail to hatch if they are disturbed at any time during this incubation period. Yet these lizard guard their tunnels for only a few days after laying their eggs.

Which of the following, if true, most helps explain why there is no need for lizards to guard their tunnels for more than a few days?

(A) The eggs are at risk of being disturbed only during the brief egg-laying season when many lizards are digging in a relatively small area.

(B) The length of the incubation period varies somewhat from one tunnel to another.

(C) Each female lizard lays from 15 to 20 eggs, only about 10 of which hatch even if the eggs are not disturbed at any time during the incubation period.

(D) The temperature and humidity within the tunnels will not be suitable for the incubating eggs unless the tunnels are plugged with sand immediately after the eggs are laid.

(E) The only way to disturb the eggs of this lizard species is by opening up one of the tunnels in which they are laid.
[Reveal] Spoiler: OA

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Re: A certain species of desert lizard digs tunnels in which to lay its eg [#permalink]

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New post 31 May 2017, 20:12
A certain species of desert lizard digs tunnels in which to lay its eggs. The eggs must must incubate inside the tunnel for several weeks before hatching, and they fail to hatch if they are disturbed at any time during this incubation period. Yet these lizard guard their tunnels for only a few days after laying their eggs.

Type- Paradox
Boil it down - Eggs must incubate for several weeks before hatching and they fail to hatch if they are disturbed . Yet eggs are guarded only for a few days .
Pre- thinking - the factor that might cause disturbance might be absent after a few days or maybe the entrance to tunnel is hidden after the first few days

(A) The eggs are at risk of being disturbed only during the brief egg-laying season when many lizards are digging in a relatively small area. - Correct
(B) The length of the incubation period varies somewhat from one tunnel to another. - Irrelevant
(C) Each female lizard lays from 15 to 20 eggs, only about 10 of which hatch even if the eggs are not disturbed at any time during the incubation period. - Incorrect if this is true , then if further strengthens the essence of protecting the eggs
(D) The temperature and humidity within the tunnels will not be suitable for the incubating eggs unless the tunnels are plugged with sand immediately after the eggs are laid. - iSWAT - If this is true , why do lizards guard for the first few days
(E) The only way to disturb the eggs of this lizard species is by opening up one of the tunnels in which they are laid. - irrelevant - we are not concerned about the way

Answer A
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Re: A certain species of desert lizard digs tunnels in which to lay its eg [#permalink]

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hazelnut wrote:
The Official Guide for GMAT Verbal Review 2018

Practice Question
Question No.: CR 154
Page:

A certain species of desert lizard digs tunnels in which to lay its eggs. The eggs must must incubate inside the tunnel for several weeks before hatching, and they fail to hatch if they are disturbed at any time during this incubation period. Yet these lizard guard their tunnels for only a few days after laying their eggs.

Which of the following, if true, most helps explain why there is no need for lizards to guard their tunnels for more than a few days?

(A) The eggs are at risk of being disturbed only during the brief egg-laying season when many lizards are digging in a relatively small area.
(B) The length of the incubation period varies somewhat from one tunnel to another.
(C) Each female lizard lays from 15 to 20 eggs, only about 10 of which hatch even if the eggs are not disturbed at any time during the incubation period.
(D) The temperature and humidity within the tunnels will not be suitable for the incubating eggs unless the tunnels are plugged with sand immediately after the eggs are laid.
(E) The only way to disturb the eggs of this lizard species is by opening up one of the tunnels in which they are laid.

Note : Official answer will be provided once GMAT Official Guide 2018 Verbal Review released.


There is competition for real estate among lizards as there is relatively small area which they prefer to dig to lay eggs.
This competition is usually high during egg laying season.
Hence eggs are at high chances of being disturbed during this egg laying season as another lizard may accidentally dig up the same space which was used by other lizard.
Once this season is over , eggs are usually not disturbed.
So it makes sense to guard eggs until the egg laying season is over.

IMO answer A .
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Re: A certain species of desert lizard digs tunnels in which to lay its eg [#permalink]

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New post 01 Jun 2017, 04:05
we need some answer which states that it is unnecessary to guard after few days. A gives exactly what we wanted. Hence, I choose A

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Re: A certain species of desert lizard digs tunnels in which to lay its eg [#permalink]

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New post 06 Jan 2018, 04:43
can anyone plz explain C.

(C) Each female lizard lays from 15 to 20 eggs, only about 10 of which hatch even if the eggs are not disturbed at any time during the incubation period.

Isn't it telling that there is no connection of disturbance to the hatching capabilities.
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Re: A certain species of desert lizard digs tunnels in which to lay its eg [#permalink]

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New post 31 Mar 2018, 11:49
Leo8 wrote:
can anyone plz explain C.

(C) Each female lizard lays from 15 to 20 eggs, only about 10 of which hatch even if the eggs are not disturbed at any time during the incubation period.

Isn't it telling that there is no connection of disturbance to the hatching capabilities.



The main point here is that the lizard needs to guard its tunnel for only a few days after laying its eggs, so we need an answer choice that lends credibility to this statement. Option C says that out of 15/20 eggs that the lizard lays only 10 hatch and we tend to assume that these 10 eggs will take a few days to hatch. Now how can we make that assumption, how do we know that 10 eggs will take a few days or many days to hatch. If 10 eggs were to take a few days to hatch then this indeed gives a reason as to why lizard guards its tunnel for only a few days but if these 10 eggs take many days to hatch then isn't the lizard expected to guard its tunnel for those many days.
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Re: A certain species of desert lizard digs tunnels in which to lay its eg [#permalink]

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New post 21 Apr 2018, 22:25
A certain species of desert lizard digs tunnels in which to lay its eggs. The eggs must must incubate inside the tunnel for several weeks before hatching, and they fail to hatch if they are disturbed at any time during this incubation period. Yet these lizard guard their tunnels for only a few days after laying their eggs.[/quote]

Which of the following, if true, most helps explain why there is no need for lizards to guard their tunnels for more than a few days?

(A) The eggs are at risk of being disturbed only during the brief egg-laying season when many lizards are digging in a relatively small area.

(B) The length of the incubation period varies somewhat from one tunnel to another.

(C) Each female lizard lays from 15 to 20 eggs, only about 10 of which hatch even if the eggs are not disturbed at any time during the incubation period.

(D) The temperature and humidity within the tunnels will not be suitable for the incubating eggs unless the tunnels are plugged with sand immediately after the eggs are laid.

(E) The only way to disturb the eggs of this lizard species is by opening up one of the tunnels in which they are laid.

I marked (D) , but after reading the explanations it is clear that (A) is better than (D).

B, C, and E are Irrelevant.

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Re: A certain species of desert lizard digs tunnels in which to lay its eg   [#permalink] 21 Apr 2018, 22:25
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A certain species of desert lizard digs tunnels in which to lay its eg

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