Dina walks out the door and a blast of cold air greets her. she goes back into the house and puts on a coat on. what is the stimulus, the sensory receptor and the response in the scenario

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

How many pounds does the earth weigh?

Can yall plz me on this question im having a hard time think about it