The rusts and smuts that seriously affect crop plants are
A. zygomycetes.
B. basidiomycetes.
C. actinomycetes.
D. chytrids.
E. ascomycetes.
Answer: B
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What are the four classes of large organic molecules important to life on Earth?
A. Carbohydrates, lipids, proteins, and sugars B. Carbohydrates, proteins, nucleic acids, and sugars C. Carbohydrates, proteins, lipids, and nucleic acids D. Carbohydrates, lipids, proteins, and enzymes
Which of these is the most common compound in the cell walls of gram-positive bacteria?
a. cellulose b. peptidoglycan c. lipopolysaccharide d. lignin e. proteinoid
Male fireflies are recognized by females of their species by their flash pattern, while male crickets are recognized by females of their species by their chirping. These are examples of
A. habitat isolation. B. mechanical isolation. C. temporal isolation. D. behavioral isolation.
An organism that uses oxygen when present but can grow without oxygen is called a(n)
A. obligate aerobe. B. facultative anaerobe. C. microaerophile. D. aerotolerant anaerobe.