These white blood cells are especially effective
at killing bacteria and will actually explode
their contents creating a net that traps and kills
pathogens. These white blood cells are
a. neutrophils.
b. macrophages.
c. B lymphocytes.
d. dendritic cells.
e. eosinophils.
A
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Which of the following statements best describes the differences between snakes and lizards?
A. All snakes lack eyelids and all lizards have eyelids. B. All snakes lack external ear openings and all lizards have external ear openings. C. Some snakes are venomous and no lizards are. D. All snakes lack limbs but all lizards have limbs. E. None of the other choices are foolproof and combinations of characteristics are sometimes necessary to distinguish lizards and snakes.
What are protocells and why are they considered important to the evolution of life?
What will be an ideal response?
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Which of the following is NOT a component of a tropical marine community?
A. All of the answers are components of a tropical marine community. B. sunlight C. algae D. corals E. fishes