In Wnt-Ca2+ pathway, Wnt binding to the receptor protein possibly Ryk, alone or in concert with Frizzled.

TLS Online TPP Program

#Id: 8427

#Unit 10. Ecological Principles

Principle of allocation - The observation that when resources are devoted to one body structure, physiological function, or behavior, they cannot be allotted to another. 

TLS Online TPP Program

#Id: 4321

#Unit 11. Evolution and Behavior

Italian physician Francesco Redi (1626–1697),

His hypothesis was supported when maggots developed in the uncovered jars, but no

maggots appeared in either the gauze-covered or the tightly sealed jars. He concluded that

maggots could only form when flies were allowed to lay eggs in the meat, and that the

maggots were the offspring of flies, not the product of spontaneous generation.

TLS Online TPP Program

#Id: 6053

#Unit 10. Ecological Principles

Temperate Grassland  Temperatures in the winter often fall below –10ºC, while summers may be very hot, approaching 30ºC, and summer droughts are not uncommon.  Annual rainfall is generally between 25 and 100 cm, too low to support a forest but higher than that in deserts.  Prairie soils are among the richest in the world, having a nutrient content much greater than that of a typical forest soil.

TLS Online TPP Program

#Id: 9444

#Unit 11. Evolution and Behavior

TLS Online TPP Program

#Id: 4991

#Unit 6. System Physiology – Plant

When stimulated natural radiation was used to vary the far-red content, it was found that for so-called sun plants, the higher the far-red content (i.e., the lower the Pfr:Ptotal ratio), the higher the rate of stem extension.