The yolky eggs of birds undergo:

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#Question id: 46

#Unit 1. Molecules and their Interaction Relevant to Biology

The three-dimensional structure of a protein is determined primarily by:

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#Question id: 12579

#Unit 10. Ecological Principles

Which of the following probably contains the highest concentration of toxic pollutants (biological magnification)? 

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#Question id: 3623

#Unit 8. Inheritance Biology

To carry out a complementation test, which of the following statement is correct?

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#Question id: 3428

#Unit 11. Evolution and Behavior

In a sample from an African population, the frequency of blood group allele IA, IB and IO were 0.30, 0.20 and 0.50 respectively. What is expected frequency of A and B blood group respectively when population size 1000?

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#Question id: 16955

#Unit 4. Cell Communication and Cell Signaling

Stage thymocytes express neither CD4 nor CD8, markers associated with mature T cells. They are therefore called double negative (DN) cells. DN cells first travel to the region under the thymic capsule, a region referred to as the ________, where they proliferate and begin to generate their T-cell receptors. Thymocytes that successfully express TCRs begin to express both CD4 and CD8, becoming double positive (DP) cells, and populate the cortex, the site where most (85% or more) immature T cells are found.