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GrogVix [38]
3 years ago
12

Which definition is the best for “semipermeable membrane”?

Biology
1 answer:
adoni [48]3 years ago
8 0
A membrane that lets only some things pass through it.
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Northern flickers are woodpeckers of the eastern United States. Males, but not females, have black feathers that resemble a mous
jek_recluse [69]

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This suggests that the moustache is a releaser for aggression.

Explanation:

<em>Fixed action patterns</em> are instinctive programmed responses in different species that are triggered by a specific external sensory stimulus. These stimuli are called sign stimuli or releaser. When the sign occurs, the animal starts a sequence of acts in response to the stimulus and continuous until the series of actions is completed.

The black feathers resembling a mustache in a <em>Northern flickers</em> male are an external sensory stimulus. This trait that can provoke another male to respond aggressively, as a f<em>ixed action pattern</em>.  

This trait might be considered as an <em>unconditioned stimulus</em>, which <em>provokes an unlearned or reflex reaction</em>. These aggressive responses are triggered by reflex.

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A totally eclipsed full moon is also known as a Blood Moon because of it's colour
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Woman with type ab blood marries a man with type b blood. if they have children, what are all the possible blood types for these
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