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aleksley [76]
3 years ago
10

Pleaseee help ASAP

Biology
1 answer:
san4es73 [151]3 years ago
6 0

Answer:

B. Fertilizer can affect the growth of bean plants.

Explanation:

due to the observation. They observed that these plants, on average, were taller than another population of the same kind of bean plants that were not treated with fertilizer

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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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