Neutrophils engulf microbes by phagocytosis to fight an infection. Normally, they perform this function for some time but then die off. These dead cells and other foreign materials form pus. Which cells then clean up all the dead neutrophils?
A) macrophages
B) other neutrophils
C) T lymphocytes
D) eosinophils
A
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Which of the following processes are typically associated with the short-term carbon cycle? Select all that apply
A. respiration B. plate tectonics C. photosynthesis D. chemical weathering
In a series of field experiments, David Tilman and colleagues investigated biodiversity and ecosystem function. They found a relationship between
A. ecosystem diversity and species richness. B. ecosystem function and genetic diversity. C. species diversity and genetic diversity. D. species diversity and ecosystem function.
If a population shows little or no evolutionary change for millions of years it is said to be in a state of ________
a. adaptive radiation b. stasis c. extinction d. decline e. evolution
The sex of a human is determined by the:a
number of chromosomes. b. number of autosomes. c. presence of only one X chromosome. d. number of sex chromosomes. e. presence of a Y chromosome.