Scientists studied a sample of 1000 species each belonging to one of

Question

Scientists studied a sample of 1000 species each belonging to one of six gene pools-ecdysozoans, arthropods, myriapods, crustaceans, hexapods, and inserts

In the first study, scientists found evidence that each species from the sample that contained ecdysozoans genes contained either arthropods genes or myriapods genes
In the second study, scientists found evidence that each species from the sample that corntained myriapods genes contained either crustaceans genes or hexapods genes.
In the third study, scientists found evidence that each species from the sample that contained hexapods genes was an insect.
In the fourth study, scientists are validating the hypothesis that each species from the sample that contained arthropods genes contained myriapods genes.

Assume that the first three studies are correct and the fourth study validates the hypothesis. Select different options for Gene Pool A and for Gene Pool B such that the following statement most accurately describes the passage. Make only two selections, one in each column.

In addition to the relationship between arthropods gene pool and myriapods gene pool validated in the fourth study, the passage implies that each species from the sample that contained __Gene Pool A genes__ also contained __Gene Pool B__ genes.

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Official Answer

Gene Pool A: Ecdysozoans Gene Pool B: Myriapods

Kaifbinarshad · Answer

The samples belong to one of the six gene pools- E, A, M, C, H, I

first study- the sample E has either A or M: (E, A) and (E, M)
Second study- the sample which contained M also contained either C or H:(M, C) and (M, H)
third study- (H, I)
fourth study is the validation which means scientists are concluding based on the observations from the first three studies that whichever sample they took if A was in it then so was M, which is (A, M)

I- (E, A) and (E, M)
so going by validation (or study IV), there is A in (E, A), so M MUST be in it which makes it (E, A, M) and (E, M) as it is (i assumed that if M is there in a sample so is A and went on wrong line of reasoning)
II- (M, C), as it is 
III-(H, I), as it is
IV-(A, M), as it is

for clearer observation, let's rewrite it as
I- (E, A, M), (E, M)
II- (M, C),
III- (H, I)
IV- (A, M)

If "E" is in a group so is "M".

RajLfcMo · Answer

I ticked out A and M, I understood your logic, but can you please tell me why A and M cant be the answer also H and I?

Kaifbinarshad · Answer

Edited it, U can revisit the solution now, thanks.

Scientists studied a sample of 1000 species each belonging to one of

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Gene Pool A	Gene Pool B
		Ecdysozoans
		Arthropods
		Myriapods
		Crustaceans
		Hexapods
		Insects

GMAT Two-part Analysis (TPA) Questions

Scientists studied a sample of 1000 species each belonging to one of

Prep Toolkit

615 to 715 in 15 Days (Ria's Strategies)

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My Rewards