The geologists ________ expounded the principle of uniformitarianism, holding that the same processes operated in the past as in the present and that the data of geology should therefore be explained by causes that we can now observe.

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#Question id: 31379

#Unit 5. Developmental Biology

The cadherin catenin complex is extremely important during compaction from a morula to the blastula. Transition of early embryonic cells into a blastula differed depending on the presence or absence of calcium ions. In addition, an investigator blocked the expression of β-catenin using vivo morpholinos to detect its effect simultaneously on compaction. Which one of the following conditions will lead to the most successful transition of the morula into the blastula?

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#Question id: 31384

#Unit 5. Developmental Biology

In drosophila, the third thoracic segment is transformed into another second thoracic segment due to:

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#Question id: 31387

#Unit 5. Developmental Biology

A sheet of cells that grows anteriorly from Koller’s sickle combines with the primary hypoblast to form the complete hypoblast layer is termed as:

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#Question id: 31390

#Unit 5. Developmental Biology

Which one of the following best describes, the number or amount of different cell types that particular stem cell type can generate? 

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#Question id: 31405

#Unit 5. Developmental Biology

The acquisition of a given cell identity based on its position or, more specifically, on the interactions that cell has with the other cells, phenomena known as:

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#Question id: 31408

#Unit 5. Developmental Biology

The Drosophila Sex-lethal (Sxl) gene is activated in females, but the Sxl protein does not form in males because of: