Trichinellosis includes all the following, except
A. the larvae migrate from intestines to blood and various body tissues.
B. infection is associated with ingestion of undercooked pork or bear meat.
C. humans are infected by ingesting encysted larvae.
D. the first symptoms are diarrhea, nausea, fever, and pain.
E. All of the choices are correct.
Answer: E
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A key is placed into a keyhole then turned and the door opens. Which of the following components of cell signaling would best correspond to turning the key?
A. the hormone B. the receptor C. conformational change in the receptor once bound to the hormone D. signal transduction E. the cell response
Structures that appear along the synaptonemal complex during pachytene where genetic material is exchanged between nonsister chromatids are the ________.
A) chiasmosomes B) telomeres C) centromeres D) recombination nodules E) kinetochores
Functions of the mantle in clams include
a. secreting the shell. b. forming pearls around irritating grains of sand. c. forming the incurrent and excurrent siphons. d. all of the above.
The total number of individuals in a given area of habitat is the
a. population density. b. population growth. c. population birth rate. d. population size. e. carrying capacity.