Which of the following are the main decomposers of the world?
A. Bacteria
B. Fungi
C. Protistans
D. A & B only
E. A, B, & C
Answer: D. A & B only
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Archaea have very diverse environmental requirements and tolerances. From what you have learned about them, which among the following conditions or substances do ALL archaeans require for survival and reproduction?
A. oxygen B. carbon C. moderate pH D. moderate temperature E. moderate salinity
During cell division, it is essential that the genetic material be distributed equally to the two daughter cells. This is accomplished through the participation of which one of the following organelles?
A) centrioles B) ribosomes C) peroxisomes D) Golgi apparatus E) nucleolus
What determines whether a carbon atom's covalent bonds to other atoms are in a tetrahedral configuration or a planar configuration?
A) the presence or absence of bonds with oxygen atoms B) the presence or absence of double bonds between the carbon atom and other atoms C) the polarity of the covalent bonds between carbon and other atoms D) the solvent in which the organic molecule is dissolved
Hooke and van Leeuwenhoek helped to create the basis of the cell theory by __________.
a. observing and documenting cells, and using microscopes to visualize the invisible structure of living things b. developing industrial products using microorganisms c. clarifying the connection between disease and microorganisms d. proving that living organisms originate spontaneously from nonliving materials