What is the correct sequence of stages in the life cycle of the Chinese liver fluke?
A. adult; sporocyst; rediae; cercaria; metacercaria; egg with miracidium; adult.
B. adult; egg with miracidium; cercaria; sporocyst; rediae; metacercaria; adult.
C. adult; egg with miracidium; metacercaria; sporocyst; rediae; cercaria; adult.
D. adult; egg with miracidium; sporocyst; rediae; metacercaria; cercaria; adult.
E. adult; egg with miracidium; sporocyst; rediae; cercaria; metacercaria; adult.
Answer: D
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The precipitin test that involves antigen and antibody diffusing toward each other, producing a visible precipitin band at the point at which they meet, is referred to as:
a. double immunodiffusion. b. counterimmunoelectrophoresis. c. particle agglutination. d. enzyme immunoassay.
All blood cells originate from the
A. erythrocyte. B. leukocytic stem cell. C. eosinophilic stem cell. D. hematopoietic stem cell.
A group of organisms of one species that interbreed and occupy the same geographical location is a
A. population. B. flock. C. herd. D. community. E. peer group.
The type of cleavage pattern represented in Figure 51-1 is:
a. holoblastic and radial.
b. holoblastic and spiral.
c. meroblastic and radial.
d. meroblastic and spiral.
e. holoblastic and mosaic.