Fo complex, with its proton pore, is composed of three subunits, a, b, and c, in the proportion ab₂ C_n, where n ranges from 8 to 15 in various organisms; in yeast, it is 10.

TLS Online TPP Program

#Id: 2257

#Unit 11. Evolution and Behavior

Underdominance, in which the heterozygote has lower fitness than both homozygotes.

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#Id: 6059

#Unit 10. Ecological Principles

Tundra:   Tundra is found at high latitudes, adjacent to ice margins, where insolation is low.  Tundra is the youngest of all biomes as it was formed after the retreat of glaciers 10000 years ago.  Lack of light and rainfall mean (25 cm per year) that rates of photosynthesis and productivity are low. Large part of the year, water can be locked away in permafrost, a layer of permanently frozen soil below 0.5–1 m.

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#Id: 10146

#Unit 6. System Physiology – Plant

According to the starch–statolith hypothesis, columella of the root cap cells represent statocytes, or gravity-sensing cells

TLS Online TPP Program

#Id: 9601

#Unit 11. Evolution and Behavior

TLS Online TPP Program

#Id: 3276

#Unit 6. System Physiology – Plant

cytochrome C oxidoreductase, couples the transfer of electrons from ubiquinol (QH2) to cytochrome c with the vectorial transport of protons from the matrix to the intermembrane space.