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Question
Submitted by reloco on Fri, 2012-11-23 13:45
due on Sat, 2012-11-24 13:00
answered 1 time(s)
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Biology 4 page essay. and short answer questions.

I need a four page essay on the following questions. No longer than a page for each topic(can be a little shorter than a page). 

 

1. Examine disruptive, stabilizing and directional selection in natural selection.

 

2. Describe sexual selection and the concept of balanced polymorphism.

 

3. What are animal "body plans"?  What kinds of animal body plans are there? What are some fundamental trends in animal evolution (three or four)?

 

4. What is speciation, and how does it happen?

 

Part II.    Shorter answers, a couple of lines for each item.    The last one, about fishes, might be a little longer.

 

6.  Why do scientists generally think that birds and reptiles are closely related evolutionarily?

 

7. What are amniote eggs, what advantages do they provide, and which species have amniote eggs?

 

8. Characterize Paleozoic, Mesozoic and Cenozoic eras in the earth’s history.

 

9. What happened to dinosaurs? Did they all go extinct?

 

10. Describe annelids.

 

11.  Describe a scientific scenario to describe how fishes may have been able to survive out of water.

Answer
Submitted by Aristotle on Sat, 2012-11-24 05:53
teacher rated 411 times
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Biology Essay

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Biology xxxxxx

xx xxxxxxx xxxxxxxxxxx stabilizing and directional xxxxxxxxx xx natural xxxxxxxxxxx

xxxxxxx Darwin in xxxx xxxxxxxxx x xxxxxxxx xxxx xxxxx xxx xxxxxx of Species, and xxx xxxx contained xxx xxxxx xxxxxxxxxx xx xxxxx xxx argued xxxx xxx xxxxxx xxxxxx on xxxxx are xxxxxxxxxxxx albeit with xxxxxxxxxxxx xxxx earlier xxxxxxxx He xxxx xxxxxxx an xxxxxxxxxxxx xxxxxxx selection, xx explain xxx xxxxxxxxx xxxxx place. Evolution takes on xxxxxxx angles, xxx one xx xxxx species normally xxxxxx their xxxxxxxxxx xx that xx can be possible xxx xxxx to xxxxxxx in xxxxx environment, xxx xxxx phenomenon is xxxxx xx adaptation. xxxx xxxxxxxxxx xx xxxx xxxxxxx xxxxxxx to natural selection xxxxx xxxxxx xxxx xxxxxx things always face x xxxxxxxx xxx xxxxxxxxx xx x xxxxxxxxxx xxxx

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