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max2010maxim [7]
3 years ago
6

Frances puts a hungry rat into an experimental chamber. whenever the rat presses a lever, food falls into a tray. in about 30 mi

nutes, the rat is pressing the lever steadily. frances returns the rat to the training cage for one hour a day every day until the rat produces young. frances then trains one of this rat's offspring in the same manner as its mother and repeats this procedure for generation after generation. you predict that when the twelfth generation rat is put into the training cage, it will press the lever steadily in about ____.
Biology
1 answer:
Murrr4er [49]3 years ago
3 0
It'll still be about 30 minutes, being able to complete a specific task that you must be taught first isn't hereditary, so it'd be about the same. 

For instance, if a woman is an amazing pianist, and she has a daughter, would the daughter also be a professional pianist automatically? No, she'd have to be taught how to play first. Sure, certain genetic traits that may help play piano more easily may have a say in it, i.e., longer fingers, but the talent of playing piano isn't passed on from mother to child through reproduction.
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The species which first flourishes on this barren land are known as pioneer species which includes the species of bryophytes and pteridophytes like lichens and mosses.

These lichens and mosses help breakdown the barren rocks through chemical leaching and help increase the nutrient content. This allows the ferns and small pteridophytes to grow.  

Then the area is colonized by the intermediate species which includes herbs, shrubs later trees. These intermediate species help attract the animals and thus help establish the biological community.

Thus, Lichens mosses → herbs→ shrubs →trees.

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<h3><u>Explanation:</u></h3>

An animal that does not have body cavity refers to an acoelomate. It is in contrast with the eucoelomates which are the animals that have body cavity. The acoelomate will not have a cavity which is filled with fluid between the digestive tract and the body. Hence there will be a distortion of body wall by the muscular activity of the digestive system.  

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