A viroid is
A. a small virus.
B. a piece of RNA.
C. a piece of protein.
D. a cell that attacks viruses.
B. a piece of RNA.
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Matching. Choose the most appropriate answer for
each. 1. ___ millipede 2. ___ annelids 3. ___ arthropods 4. ___ placozoan 5. ___ cnidarians 6. ___ echinoderms 7. ___ flatworms 8. ___ rotifers 9. ___ mollusks 10. ___ roundworms 11. ___ sponges A. two pairs of legs per segment B. tiny, flattened, crawling forms C. planarians, flukes, tapeworms D. nematodes E. snails, squids, clams F. wheel animals G. flagellated collar cells present H. jellyfish and corals I. crustaceans, ticks, and insects J. polychaetes, earthworms, leeches K. sea urchins, sea stars
These phospholipids are found in cell membrane and also help in the emulsification of fats. They help to separate large portions of fat into smaller units. This allows the fat to mix with other materials.
A. triglycerides B. lecithins C. steroids D. linoleic acid
The _____________ theory states that disease may be originated from proximity to decomposing matter and is not due to persons-to-person contact.
Fill in the blank(s) with the appropriate word(s).
Which two hepatitis viruses are generally acquired in a similar manner?
A. HBV and HBC B. HBA and HBV C. HBA and HBC D. None of the viruses are acquired in the same manner.