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A cell lacking which of the following structures is most likely to be a prokaryote?

Which protist is a concern because of its ability to contaminate water supplies and cause diarrheal illness?

The autoclave uses which of the following mechanism(s) for sterilization?

All cells (prokaryotic and eukaryotic) have which of the following?

You plan to compare two different diets that are used to feed tadpoles raised in a lab. One diet is meat-based fish food. The other diet is the traditional diet of boiled lettuce. You want to know if the meat-based diet will be associated with an increase in the average overall weight of the tadpoles. In the experiment you keep all other factors such as temperature, pH, tadpole density per pan, and amount of food constant (controlled variables). The only thing that is different is the type of food between the two groups. Based on the information provided, what is the dependent variable?

The envelope of a virus is derived from the host’s 

A controlled experiment is one that is repeated many times to make sure the results are accurate.

Soaps are disinfectants.

Which protists are associated with red tides?

Which genus is the causative agent for malaria?