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# Millions of identical copies of a plant can be produced

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Joined: 05 Jun 2009
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Millions of identical copies of a plant can be produced  [#permalink]

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13 Aug 2009, 04:44
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Question Stats:

86% (01:30) correct 14% (01:46) wrong based on 357 sessions

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Project CR Butler:Day 15:Critical Reasoning (CR1)

Millions of identical copies of a plant can be produced using new tissue-culture and cloning techniques.
If plant propagation by such methods in laboratories proves economical, each of the following, if true, represents a benefit of the new techniques to farmers EXCEPT:

(A) The techniques allow the development of superior strains to take place more rapidly, requiring fewer generations of plants grown to maturity.
(B) It is less difficult to care for plants that will grow at rates that do not vary widely.
(C) Plant diseases and pests, once they take hold, spread more rapidly among genetically uniform plants than among those with genetic variations.
(D) Mechanical harvesting of crops is less difficult if plants are more uniform in size.
(E) Special genetic traits can more easily be introduced into plant strains with the use of the new techniques.

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Re: Millions of identical copies of a plant can be produced  [#permalink]

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13 Aug 2009, 06:03
sudeep wrote:
Millions of identical copies of a plant can be produced using new tissue-culture and cloning techniques.
If plant propagation by such methods in laboratories proves economical, each of the following, if true, represents a benefit of the new techniques to farmers EXCEPT:

(A) The techniques allow the development of superior strains to take place more rapidly, requiring fewer generations of plants grown to maturity.
true if a super strain is acquired it could be cloned so saves time to "reach" that point

(B) It is less difficult to care for plants that will grow at rates that do not vary widely. maybe - passage talked about cloning but nothing about rates.
(C) Plant diseases and pests, once they take hold, spread more rapidly among genetically uniform plants than among those with genetic variations. MAYBE - if true then the cloned will get attacked more since theoretically they should have SAME genetics
(D) Mechanical harvesting of crops is less difficult if plants are more uniform in size. true
(E) Special genetic traits can more easily be introduced into plant strains with the use of the new techniques. true

OA:
Later

I think C - cloning means same genetics so the diseases/pests should spread more rapidly.
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Re: Millions of identical copies of a plant can be produced  [#permalink]

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13 Aug 2009, 06:23
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sudeep wrote:
Millions of identical copies of a plant can be produced using new tissue-culture and cloning techniques.
If plant propagation by such methods in laboratories proves economical, each of the following, if true, represents a benefit of the new techniques to farmers EXCEPT:

(A) The techniques allow the development of superior strains to take place more rapidly, requiring fewer generations of plants grown to maturity.
(B) It is less difficult to care for plants that will grow at rates that do not vary widely.
(C) Plant diseases and pests, once they take hold, spread more rapidly among genetically uniform plants than among those with genetic variations.
(D) Mechanical harvesting of crops is less difficult if plants are more uniform in size.
(E) Special genetic traits can more easily be introduced into plant strains with the use of the new techniques.

OA:
Later

Clearly its C.
Its given in the question stem that 'identical copies' of plants can be made. Identical copies would obviously have uniform genetics too.
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Re: Millions of identical copies of a plant can be produced  [#permalink]

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29 Dec 2018, 17:55
mikemcgarry

Hi Mike,

Can you kindly provide the explanation for this question. Waiting eagerly for valuable inputs.

Regards.
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Re: Millions of identical copies of a plant can be produced   [#permalink] 29 Dec 2018, 17:55
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