A loss-of-function mutation in which of the following would inhibit TGFβ signaling?

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#Question id: 12124

#Unit 10. Ecological Principles

Which of the following describes the relationship between ants and acacia trees?

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#Question id: 10479

#Unit 1. Molecules and their Interaction Relevant to Biology

All hydrophobic amino acids (valine, leucine, isoleucine, etc.) share which of the following properties

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#Question id: 7275

#Unit 5. Developmental Biology

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: 28419

#Unit 5. Developmental Biology

A 1-cell-thick area in the center of the avian blastoderm that forms most of the actual embryo is called___

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#Question id: 23712

#Unit 8. Inheritance Biology

Only a few and easily distinguished phenotype exhibit,