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Liono4ka [1.6K]
3 years ago
7

Two birds that look very similar to each other have always been considered two distinct species based on differences in their bo

dy size and in where they live. A group of ornithologists studying the two species begins to think they might not be separate species based on observed behavior. What would be the best next step regarding this new hypothesis?
Biology
2 answers:
exis [7]3 years ago
7 0
The evaluation of their DNA and short tandem repeats will let them know if the birds are related or not. The genetic linkage will provide information about their common ancestry as well as if they belong to the same species, or are closely related species. 
marusya05 [52]3 years ago
7 0

Answer:

A Genetic structure analysis

Explanation:

An analysis of genetic structure will help to know if these two groups are really different species. For that, some mitochondrial markers could be used first. Mitochondrial markers are used quite frequently for this purpose, since they usually show genetic preferences between different species. This is because they evolve faster than nuclear markers.

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4 0
2 years ago
A mutant strain of yeast is able to produce 2 ATP for each glucose molecule digested in the absence of oxygen. What makes this s
Free_Kalibri [48]

Answer:

Explanation:

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pyruvate ⇒ acetaldehyde + NADH ⇒ ethanol + NAD

The pyruvate is converted to acetaldehyde by the enzyme, pyruvate decarboxylase. It should be NOTED that carbon dioxide is released in this step. The acetaldehyde produced in the "first step" is then converted to ethanol by the enzyme alcohol dehydrogenase. It must be noted from the above that the steps are irreversible.

If a mutated strain of yeast is unique because it does not produce alcohol and lactic acid (which is referred to as toxic acid in the question); thus having a high level of pyruvate because of the presence of a novel enzyme.   <u>The function of this novel enzyme will most likely be the conversion of acetaldehyde in the presence of carbondioxide back to pyruvate; thus making that step reversible</u>. This could be a possible explanation for the high level of pyruvate present in the yeast.

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2 years ago
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Answer:

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3 years ago
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