Corey and sally are studying energy transformation. they follow these steps. corey rubs a balloon on the hair of his head corey moves the same balloon toward the top of sally's head dally's hair stands straight up identify the type of energy that is added to the system and transformed into potential energy in an electric field. explain how this model demonstrates that forces can affect objects without touching them.

Imagine a self-reactive t cell that has not undergone clonal deletion in the thymus (that is to say, it has escaped central tolerance). if it encounters self antigen in the absence of an infection or inflammation, what will happen to this self-reactive t cell? (select two answers) (a) the t cell undergoes clonal expansion. (b) the t cell gains effector functions. (c) the t cell undergoes apoptosis. (d) the t cell becomes activated. (e) the t cell becomes anergic.

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

Where does oogenesis take place ? seminiferous tubules fallopian tubes ovaries uterus