BIO 225 Exam (98 most important Questions with Answers)
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Course
BIO 225
Institution
BIO 225
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1. _____ single celled organism with spherical, rod, and spiral shapes. No cell nucleus.
Lack membrane-enclosed intracellular structures found in most other cells.
Answer: Bacteria
2. _____ single celled organism Have a cell nucleus.
Answer: Algae
3. Algae produce _______ of oxygen in the atmosphere.
Answer: 70%
4. Algae is the _____ link in the food chain.
Answer: First
5. ______ many are single celled. Have cell nucleus. Generally do not move but can form
networks of branching filaments. Decomposers of dead organisms.
Answer: Fungi
6. _____ are A-cellular too small to be seen with light microscope.
Answer: Viruses
7. Viruses are composed of specific chemical substances:
Answer: Nucleic Acid & A few Proteins
8. Viruses can ______ and display other properties of living organisms only when they have
______ cells.
Answer: Replicated, Invaded
, 9. Smaller A-cellular agents of diseases are ______ and _______.
Answer: Viroids, Prions
10. _____ nucleic acid without a protein coating (various plant disease.)
Answer: Viroids
11. _____ protein without any mucleic acid (mad cow disease).
Answer: Prions
12. _____ single celled. At least one nucleus. A few species are large enough to be seen with
naked eye.
Answer: Protozoa
13.Protozoa can be found in a variety of water and soil environments and also some animals
such as _____-_______ ______.
Answer: Malaria-carrying mosquitoes
14._____ worms, have microscopic stages in their life cycles that can cause disease.
Answer: Helminths
15. ______ insect and similar organisms can transmit these stages as well as other disease
causing microbes.
Answer: Arthropods
16. _____ the study of microbes. Organisms are classified by structure and function.
Answer: Microbiology
17. What is Taxonomy?
Answer: Classification of microorganisms by structure or function
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