1. Mercury
2. Cadmium
3. Silver
4. Manganese
Manganese
1. gill nets
2. lines
3. trawl nets
4. stake nets
lines
1. Schistosoma haematobium
2. Wuchereria bancrofti
3. Ancylostoma duodenale
4. Enterobius vermicularis
Enterobius vermicularis
1. acoelomates
2. pseudocoelomates
3. heaumochmates
4. coelomates
acoelomates
1. Hydra fusca
2. Hydra oligactis
3. Hydra viridis
4. Hydra vulgaris
Hydra vulgaris
1. Four
2. three
3. two
4. one
one
1. Human subdermal spaces
2. muscles of Culex
3. salivary glands of Culexa
4. human lymph glands
human lymph glands
1. one
2. two
3. four
4. eight
four
1. glutamic acid
2. glutathione
3. guanine
4. sporocyst
glutathione
1. redia
2. cercairn
3. miracidium
4. sporocyst
miracidium