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Biologist Valentina Gómer-Nahamón and her team have investigated two subspecies of the fork-tailed flycatcher bird that live in the same region in Colombia.but one subspecies migrates south for part of the year, and the other doesn't. The researchers found that, due to alight differences in feather shape, the feathers of migratory forked-tailed flycatcher males make a sound during flight that is higher pitched than that made by the feathers of nonmigratory make. The researchers hypothesize that fork tailed flycatcher females are attracted to the specific sound made by the males of their own subspecies, and that over time the females' preference will drive further genetic and anatomical divergence between the subspecies Which finding, if true, would most directly support Gómez-Rahamon and her team's hypothesis? A) The feathers located on the wings of the migratory fork-tailed flycatchers have a narrower shape than those of the nonmigratory birds. which allows them to fly long distances. B) Over several gencrations the sound made by the feathers of migratory make fork tailed flycatchers grows progressively higher pitched relative to that made by the feathers of nonmigratory males. C) Fork-tailed flycatchers communicate different messages to each other depending on whether their feathers create high pitched of low-pitched sounds. D) The breading habits of the migratory and procally the same over secreal penerations. nonmigratory fork-tailed flycatchers remained

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Biologist Valentina Gómer-Nahamón and her team have investigated two subspecies of the fork-tailed flycatcher bird that live in the same region in Colombia.but one subspecies migrates south for part of the year, and the other doesn't. The researchers found that, due to alight differences in feather shape, the feathers of migratory forked-tailed flycatcher males make a sound during flight that is higher pitched than that made by the feathers of nonmigratory make. The researchers hypothesize that fork tailed flycatcher females are attracted to the specific sound made by the males of their own subspecies, and that over time the females' preference will drive further genetic and anatomical divergence between the subspecies Which finding, if true, would most directly support Gómez-Rahamon and her team's hypothesis? A) The feathers located on the wings of the migratory fork-tailed flycatchers have a narrower shape than those of the nonmigratory birds. which allows them to fly long distances. B) Over several gencrations the sound made by the feathers of migratory make fork tailed flycatchers grows progressively higher pitched relative to that made by the feathers of nonmigratory males. C) Fork-tailed flycatchers communicate different messages to each other depending on whether their feathers create high pitched of low-pitched sounds. D) The breading habits of the migratory and procally the same over secreal penerations. nonmigratory fork-tailed flycatchers remained

Biologist Valentina Gómer-Nahamón and her team have investigated two subspecies of the fork-tailed flycatcher bird that live in the same region in Colombia.but one subspecies migrates south for part of the year, and the other doesn't. The researchers found that, due to alight differences in feather shape, the feathers of migratory forked-tailed flycatcher males make a sound during flight that is higher pitched than that made by the feathers of nonmigratory make. The researchers hypothesize that fork tailed flycatcher females are attracted to the specific sound made by the males of their own subspecies, and that over time the females' preference will drive further genetic and anatomical divergence between the subspecies Which finding, if true, would most directly support Gómez-Rahamon and her team's hypothesis? A) The feathers located on the wings of the migratory fork-tailed flycatchers have a narrower shape than those of the nonmigratory birds. which allows them to fly long distances. B) Over several gencrations the sound made by the feathers of migratory make fork tailed flycatchers grows progressively higher pitched relative to that made by the feathers of nonmigratory males. C) Fork-tailed flycatchers communicate different messages to each other depending on whether their feathers create high pitched of low-pitched sounds. D) The breading habits of the migratory and procally the same over secreal penerations. nonmigratory fork-tailed flycatchers remained

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The finding that would most directly support Gómez-Rahamon and her team's hypothesis is 'B'.

Açıklamak

## Step 1<br />The problem is asking us to identify which finding would most directly support the hypothesis that fork-tailed flycatcher females are attracted to the specific sound made by the males of their own subspecies, and that over time, the females' preference will drive further genetic and anatomical divergence between the subspecies.<br /><br />## Step 2<br />Option A talks about the shape of the feathers which allows for long-distance flight. This doesn't directly support the hypothesis about females being attracted to the sound made by the males.<br /><br />## Step 3<br />Option B discusses the progressive increase in the pitch of the sound made by the feathers of migratory males over several generations. This finding directly supports the hypothesis as it shows a change in the sound made by the migratory males, which could be the reason for the females' preference.<br /><br />## Step 4<br />Option C talks about the communication between the flycatchers, but it doesn't specify whether this communication is related to the sound made by the feathers.<br /><br />## Step 5<br />Option D discusses the breeding habits of the flycatchers, but it doesn't provide any information about the sound made by the feathers.
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