Which of the following is an acid?
A. K2SO4
B. NaNO3
C. CaCO3
D. H3PO4
D. H3PO4
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Single layer of cube shaped cells
A. Pseudostratified columnar B. Simple columnar C. Simple cuboidal D. Simple squamous E. Stratified squamous F. Transitional
Plants do not have a circulatory system like that of some animals. If a water molecule in a plant did "circulate" (that is, go from one point in a plant to another and back in the same day), it would require the activity of _____
A) only the xylem B) only the phloem C) only the endodermis D) both the xylem and the phloem
Which class of drugs interferes with the virus inserting itself into host DNA?
A. Protease inhibitors B. Reverse transcriptase inhibitors C. Integrase inhibitors D. Fusion inhibitors E. All of the choices are correct.
Phosphorus is needed by living organisms because it is a part of proteins.
Answer the following statement true (T) or false (F)