Conditional specification is the process by which cells achieve their respective fates by interacting with other cells.

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#Id: 6579

#Unit 7. System Physiology – Animal

MIS causes regression of the müllerian ducts

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#Id: 1429

#Unit 4. Cell Communication and Cell Signaling

Integrins typically exhibit low affinities for their ligands, with dissociation constants (Kd) between 10−6 and 10−7 mol/L.

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#Id: 1250

#Unit 7. System Physiology – Animal

Posterior pituitary secretes neuropeptides, ADH and oxytocin

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#Id: 7532

#Unit 6. System Physiology – Plant

According to the current hypothesis, the gradient in phototropin phosphorylation induces the movement of auxin to the shaded side of the coleoptile. Once the auxin reaches the shaded side of the tip, it is transported basipetally to the elongation zone, where it stimulates cell elongation. The acceleration of growth on the shaded side and the slowing of growth on the illuminated side (differential growth) give rise to the curvature toward light.

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#Id: 2098

#Unit 8. Inheritance Biology

Chromosome duplications are one way in which new genes evolve.