The following experiment is designed to study the role of several hormones in the regulation of metamorphosis in frogs.

Group #	Treatment	Days to Metamorphosis
1	Saline	30
2	Prolactin	> 100
3	TSH	15
4	Thyroxine	10
5	Corticosterone	30
6	Thyroxine + Corticosterone	5
7	Prolactin + TSH	30
8	Thyroid gland removed	> 100

 

If the thyroid gland were removed from the tadpoles in Group 4, metamorphosis would

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#Question id: 12324

#Unit 10. Ecological Principles

According to the nonequilibrium model,

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#Question id: 12325

#Unit 10. Ecological Principles

According to bottom-up and top-down control models of community organization, which of the following expressions would  imply  that  an  increase  in  the  size  of  a  carnivore  (C)population  would  negatively  impact  on  its  prey  (P) population, but not vice versa? 

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#Question id: 12326

#Unit 10. Ecological Principles

Please refer to the following art to answer the following question.

According to the Shannon Diversity Index, which block would show the greatest diversity?

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#Question id: 12327

#Unit 10. Ecological Principles

Which  of  the  following  is  the  most  accepted hypothesis as  to  why  invasive  species  take  over  communities into which they have been introduced?

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#Question id: 12328

#Unit 10. Ecological Principles

The dominant species in a community is

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#Question id: 12329

#Unit 10. Ecological Principles

In a tide pool, 15 species of invertebrates were reduced to eight after one species was removed. The species removed was likely a(n)