Answer:
In this scenario, the green light is a(n) <u><em>signal</em></u>.
Explanation:
In the above scenario, with time, the pigeon has learnt that he will be rewarded only when the green light is on. Such a condition is known as learned behaviour. In the future, the pigeon will only peck the button when the green light is on because he will know that he will be rewarded for pecking the button only when the green light is on. Hence, the green light is the signal for the pigeon to start pecking the button.
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Answer:
Competition: Biotic
Disease: Biotic and Abiotic
Earthquake: Abiotic
Prey: Biotic
Soil: Abiotic
Sunlight: Abiotic
Symbiosis: Biotic
temperature: Abiotic
Thunder: Abiotic
Storm: Abiotic
Water table: Abiotic
Explanation:
An ecosystem comprises of biotic as well as abiotic factors. Biotic factors are the living components of an ecosystem. Abiotic factor are the non-living components of an ecosystem. Factors like diseases can be either biotic if they are caused by infectious agents or can be abiotic if they are caused by environmental factors.