Which of the following is/are true of capsules?
A. They retain water and help prevent desiccation of the bacteria.
B. They prevent entry of many bacterial viruses.
C. They help bacteria escape phagocytosis by host cells.
D. All of the choices are correct.
Answer: D
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A. M protein B. Protein A C. Collagen D. Pilin
How do primary producers provide energy for the food chain?
A. They break down organic molecules into inorganic elements. B. They make their own organic molecules via photo- or chemosynthesis. C. They receive energy from secondary consumers. D. They pass on organic substances from primary consumers.
How many "turns" are present in insulin chain B?
a. 1 b. 2 c. 3 d. 4
____ are phagocytes that engulf bacteria and cellular debris
a. Eosinophils b. Leucocytes c. Monocytes d. Platelets e. Neutrophils