The grouping of viruses is based partly on
a. presence or absence of an envelope
b. presence or absence of nucleic acid
c. type of organism they infect
d. structure of their organelles

solvent

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the correct answer is: d. the saltine and pretzel are made of flour, yeast, and baking soda, and salt. the pecan contains no flour but it does contain fats. the pecan is a nut that can be consumed as a healthy snack. first of all, pecans are a source of fat (monounsaturated fat), but they provide less fat than some other nuts. pecans are a rich source of dietary fiber, manganese magnesium, phosphorus, thiamin, vitamin e…