Which of the following factors do leaching and soil
erosion have in common?
a. strong winds
b. mineral composition of soil
c. moving water
d. climate
e. none of these
Answer: c
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In this representation of transcription, strand #
____ is ____ because it ____.
a. 2; RNA; is double-stranded b. 3; RNA; contains uracil c. 2; RNA; contains thymine d. 2; RNA; has no uracil e. 3; DNA; contains adenine
Marine snow is a major source of energy for the ____ region of the ocean
a. littoral b. aphotic c. euphotic d. intertidal e. neustonic
Which of the following lists the structures of the male reproductive tract in the proper order from sperm production to ejaculation?
A. seminal vesicles; vas deferens; prostate; urethra; ejaculatory duct B. vas deferens; epididymis; seminiferous tubules; ejaculatory duct; urethra C. vas deferens; epididymis; seminal vesicles; ejaculatory duct; urethra D. epididymis; seminiferous tubules; ejaculatory duct; vas deferens; urethra E. seminiferous tubules; epididymis; vas deferens; ejaculatory duct; urethra
Normal microbiota provide protection from infection in each of the following ways EXCEPT
A) they produce antibacterial chemicals. B) they compete with pathogens for nutrients. C) they make the chemical environment unsuitable for nonresident bacteria. D) they produce lysozyme. E) they change the pH of the environment.