How has the system of classifying organisms changed since linnaeus’s work?

a. levels have been taken away from the hierarchy.

b. organisms have been identified simply as plants or animals.

c. more levels have been added to the hierarchy.

d. a hierarchy has been developed.

Hairs that clean dirt out of the air in your nasal passages are called: a. sinus b. trachea c. cilia d. mucus

Ascientist conducted an investigation about the effects of diet on disease resistance in rats and made surprising observations. the mice with a genetic ear mutation seemed to show similar patterns of resistance compared to mice with normal ears. based on this information, what will most likely occur? a.she will perform a second investigation on the role of certain genes in disease resistance. b.she will revise her hypothesis to pertain to mutations rather than diet, and update her data accordingly. c.she will use this information to determine that her original question was nonscientific, so she will revise it. d.she will determine that her hypothesis was invalid because resistance must be genetic.

During the past 150 years in the united states, how did energy consumption compare to population growth?