Two of the main ingredients in plant fertilizer are phosphorus and nitrogen. These elements are required for the synthesis of __________________, respectively, in the cells of the plants
A. DNA and proteins
B. proteins and complex carbohydrates
C. complex carbohydrates and DNA
Answer: A
Biology & Microbiology
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The endosperm of an angiosperm seed is typically:a
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Which of the following has been associated with a form of liver cancer?
A. Hepatitis A virus B. Hepatitis B virus C. Human T-cell lymphotropic virus D. Human papilloma virus
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__________ or __________ extend from many prokaryotic cells and serve in attachment and motility
ANSWER: Pili; flagella Fill in the blank(s) with the appropriate word(s).
Biology & Microbiology
A filamentous organelle comprised of tubulins with a diameter of 25 nm is called ________.
A. microtubule B. microfilament C. intermediate filament D. mycelia
Biology & Microbiology