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goldfiish [28.3K]
3 years ago
11

Fish hatchery workers know that if they want artificially spawned salmon to return to a specific stream to spawn when they reach

adulthood, the workers have to raise the fry (baby salmon) in water from that stream during a certain critical time in their early development. This is a clear demonstration of _____.
a. trial-and-error learning
b. operant conditioning
c. imprinting
d. habituation
Biology
1 answer:
notsponge [240]3 years ago
3 0

Answer:

c. imprinting  

Explanation:

Imprinting is the object of study of ethology, which is related to animal behavior. In the early stage of an animal's life, imprinting is an essential and most conducive phase for learning and subsequent development. The two main types of imprinting are sexual and filial.  In sexual imprinting, a young animal learns the traits it seeks in a mate. Affiliate imprinting is the learning of a offspring from his / her parent.

In the case of the salmon fish situation, the need for workers to raise fingerlings (salmon) in stream water during a certain critical period in their early development is an example of imprinting. In this case, imprinting is necessary for the development of this animal in a different environment from the one it was raised.

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Answer:

Option D, Continents cannot cut through the ocean floor.

Explanation:

It was believed earlier that oceans were the land bridges that used to connect  different geologic plates of planet earth earlier, had now sank down and thus there exists no connection between the tectonic plates. Therefore,  without any link or connection, continents cannot cut through the ocean floor.

Also as per the Land Bridge Theory , there has been continuous shifting of dry land due to which identical land species on different continents were found.

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aliina [53]


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In RNA, there is slight difference in base pairing. Since RNA never has Thymine in its structure, the thymine has been replaced with Uracil.  Therefore in RNA,  Adenine will pair with Uracil.

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