Primary neurulation forms the anterior portion of the neural tube

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#Id: 2987

#Unit 13. Methods in Biology

During differential sedimentation the largest class of particles forms a pellet on the
bottom of the centrifuge tube, leaving smaller-sized structures within the supernatant.

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#Id: 9438

#Unit 11. Evolution and Behavior

Polygynous

In polygyny, one male mates with more than one female in a single breeding season, but females mate only with one male.

In species with male-male competition, males are often substantially larger than females, a phenomenon called sexual dimorphism.

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#Id: 6336

#Unit 8. Inheritance Biology

Sex Determination in Drosophila melanogaster Y-linked characteristic  Characteristic determined by a gene or genes on the Y chromosome.

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#Id: 375

#Unit 2. Cellular Organization

Circular DNA molecules purified from both bacteria and eukaryotes are usually negatively supercoiled, having values of s of approximately –0.06.

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#Id: 1725

#Unit 4. Cell Communication and Cell Signaling

Soluble CD23 binds to CD21 on the surface of IgE synthesizing B cells, IgE synthesis is increased.