A properly functioning immune system is responsible for
A. destruction of foreign material.
B. recognition of foreign material.
C. surveillance of the body.
D. All of the choices are correct.
Answer: D
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Dinoflagellates became photosynthetic via secondary endosymbiosis
Indicate whether the statement is true or false.
The process by which new species originate
A. is germination. B. is extinction. C. occurred only once in Earth's history. D. is speciation. E. occurred for millions of years but is no longer occurring.
In the brain, the visual centers are located in the occipital lobes
____________________ Indicate whether the statement is true or false.
Which of the following is NOT a feature associated with filtration?
A) nitrocellulose or plastic membrane filters B) sterilization of heat-sensitive materials C) varying thicknesses of membrane filters used D) use of HEPA filters to filter air E) ability of some filters to trap viruses and proteins