In a study comparing the genetic contribution to eating disorders, researchers found that in ___% of identical twin pairs both twins had bulimia nervosa, while that number was ___% of fraternal twin pairs. Although this does not rule out the influence of environmental and sociocultural factors, it does present compelling evidence for a genetic contribution to these conditions.

What is earths lithospheric plates interact at

Archaebacteria use for movement. celia flagella pili cell walls

Ascientist is investigating the effects of salinity on fish development. he places fertilized fish eggs in an aquarium that contains low salinity and observes their development. what factor would improve experimental design the most? place the fish eggs in the open ocean because that is the natural habitat include another aquarium that has normal salinity to compare to the low salinity aquarium include an aquarium that replaces salt with sugar to confirm that the effects are specific to salt grow algae with the fish eggs in order to provide adequate nutrients to the developing embryos