Why is the pasta you buy from the grocery store shelf considered a nonperishable food?
A) It has a low nutritional content.
B) It was sterilized during preparation.
C) The low moisture content prevents microbial growth.
D) Various preservative chemicals are added.
E) Microbes present in the pasta inhibit the growth of harmful microbes.
C
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Increasing atmospheric carbon dioxide is
A) increasing sedimentation of C, Ca, and Si. B) increasing the effect of the biological pump. C) fueling increased primary production in ocean waters. D) acidifying the ocean and decreasing the rate of formation of calcareous shells.
An organ that is hygroscopic
a. is sensitive to changes in moisture. b. is exemplified by the peristomal teeth in the sporophyte of mosses. c. may aid in spore dispersal in mosses. d. is all of the above.
Monocot roots have centrally located ground tissue called pith, surrounded by a ring of xylem and phloem bundles.
Answer the following statement true (T) or false (F)
The direction of genetic information transfer in a retrovirus (such as HIV) is
A. RNA to DNA to mRNA to protein. B. RNA to mRNA to protein. C. RNA to protein. D. DNA to protein. E. DNA to mRNA to protein.