how Dr. Schneider's observations with hummingbirds demonstrate the operation, in hummingbird populations, of each of the four components of natural selection listed in the video. In this video, Dr. Schneider points out that some of the hummingbird species in his study are 2 million to 3 million years old, which he notes makes them very young species?

Schneider's observations with hummingbirds demonstrates the operation in hummingbird populations, because for one variation in the hummingbirds can give the birds long beaks or short beaks which is heredity and when there is that reproduction depending on the environment of the bird it will either live to reproduce

Explanation:

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answer; i believe it was by president pranab mukherjee or by the chief justice of kerala high court; ///plz check luck

the correct answer is modern american cars are not available due to trade restrictions.

trade between cuba and the united states have serious restrictions. the u.s. imposed an economic embargo on cuba, that among other things means that modern american cars are not available due to trade restrictions.

in response to some governmental actions of the authorities from cuba, president john f. kennedy proclaimed an embargo on trade between both countries in february 1962. the trade embargo remains active until this day and was implemented directly by the departments of commerce and the department of treasury.

in president trump’s administration, there is a national security presidential memorandum that "strengthens the policy of the u. s.", affecting trade with cuba.