Most inspired particles such as dust fail to reach the lungs because of the .a. ciliated mucous lining of the upper respiratory tractb. abundant blood supply to nasal mucosac. action of the epiglottisd. porous structure of turbinate bones

What causes darkening of the skin as melanin production increases

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

Why is a mushroom considered a heterotroph