Question and answer
Which one of these creatures is an echinoderm? A. Sea star B. Spider C. Grasshopper D. Crab
Sea star is an echinoderm.
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akoine|Points 2078|
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Asked 2/3/2013 8:53:11 PM
Updated 4/1/2018 8:03:57 PM
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This answer has been confirmed as correct and helpful.
Edited by Jay901 [4/1/2018 8:03:46 PM], Confirmed by Jay901 [4/1/2018 8:03:48 PM], Edited by Jay901 [4/1/2018 8:03:57 PM]
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7. Biology is the study of A. the physical world. B. plants. C. animals. D. life.
Question
Updated 1/17/2014 8:44:37 AM
1 Answer/Comment
Biology is the study of D. life.
Added 1/17/2014 8:44:34 AM
This answer has been confirmed as correct and helpful.
In a population of horses, an extreme phenotype is favored and the distribution of genes in that population shifts toward that phenotype. This process is called _______ selection. A. stabilizing B. disruptive C. directional D. random
Question
Updated 11/29/2017 5:03:22 AM
1 Answer/Comment
In a population of horses, an extreme phenotype is favored and the distribution of genes in that population shifts toward that phenotype. This process is called directional selection.

Added 11/29/2017 5:03:22 AM
This answer has been confirmed as correct and helpful.
The varieties of beak structures among Galapagos finches is a good example of A. random radiation. B. adaptive radiation. C. allopathic speciation. D. sympatric evolution.
Weegy: The varieties of beak structures among Galapagos finches is a good example of adaptive radiation. (More)
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Updated 11/1/2018 7:28:35 AM
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18. Scientists who argue that modern humans evolved from a single population believe that humans came from the continent of A. South America. B. Asia. C. Europe. D. Africa.
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Updated 10/20/2015 11:31:24 AM
1 Answer/Comment
Scientists who argue that modern humans evolved from a single population believe that humans came from the continent of: AFRICA.
Added 10/20/2015 9:07:54 AM
This answer has been confirmed as correct and helpful.
Confirmed by yumdrea [10/20/2015 11:31:25 AM]
2. In the human immune system, the main function of the _______ is filtering blood. A. tonsils B. spleen C. thymus gland D. appendix
Weegy: In the human immune system, the main function of the spleen is filtering blood. (More)
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Updated 11/11/2017 4:51:35 PM
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