Which molecule has the shape of a completed tetrahedron?
a. Methane CH4
b. Water H2O
c. Oxygen Gas O2
d. Hydrogen Gas H2
Ans: a. Methane CH4
Biology & Microbiology
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Any organism that can cause disease in the host after direct interaction is a(n)
A. secondary pathogen. B. focal pathogen. C. opportunistic pathogen. D. primary pathogen.
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________ is the field concerned with the management and analysis of biological data using computers.
Fill in the blank(s) with the appropriate word(s).
Biology & Microbiology
Which of the following is most likely to be aquatic?
A) suspension feeder B) mass feeder C) deposit feeder D) fluid feeder
Biology & Microbiology
The most widely accepted and supported model that explains the movement of phloem sap in flowering plants is the
____ mechanism.
a. cohesion-tension b. translocation c. pressure flow
d. osmosis e. transpiration
Biology & Microbiology