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ra1l [238]
3 years ago
11

What prevented early plants from moving far from water?

Biology
1 answer:
RSB [31]3 years ago
7 0
D they dried out easily
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In the linear structure of sugars having an aldehyde group, are called aldoses, and sugars having a keto group are called ketoses.

Like adehydes H-C=O the carbonyl carbon is the first/last in the chain it is bounded to Hydrogen, double bounded to oxygen and a single bond to the chain. An aldose linear sugar like D-glucose have the carbonyl carbon as it first carbon.

But ketones R-COR the carbonyl carbon is in between the chain, it is bounded to two carbons on both sides. Like D-fructose the keto carbon is the second carbon.

In a open ring structure the 1st carbon, adehyde group is condensed with the hydroxy group (OH) of the 5th carbon forming a ring. The first carbon is now bound to the chain, Hydrogen, OH and oxygen which forms the ring.

In the keto open ring structure of D-fructose, the second carbon(keto group) is condensed with the OH of the 5th carbon

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