The T. solium organism, which causes cysticercosis and can grow to be 1.5 to 8 meters long, contains 7 to 13 lateral uterine branches along the proglottid. The intermediate host is:
a. dogs.
b. cats.
c. pigs.
d. cattle.
C
T. solium, the pork tapeworm, is the intestinal cestode capable of causing serious pathologic damage to the human host. Humans serve as the definitive host, whereas pigs serve as the inter-mediate host. Humans can also serve as the intermediate host. T. solium may result in an intes-tinal infection, in which the larvae mature and reside in the small intestine for up to 25 years. The organisms can grow to be 1.5 to 8 meters long and produce over 1000 proglottids, each contain-ing approximately 50,000 eggs. Cysticercosis is the extraintestinal form of the disease and can be significantly more severe. The disease is life threatening if the organism invades the central nervous system.
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The bond in which bonded atoms share electrons is called a(n) ________.
A. covalent bond B. ionic bond C. polar bond D. hydrogen bond
Nori, used to wrap sushi, is:
a. red algae b. green algae c. brown algae d. golden algae e. diatoms
T cell receptors can discriminate between self (MHC markers) and nonself (____)
Fill in the blank(s) with correct word
Your friend is an amateur aquarist learning to breed clownfish. She had one successful clutch of eggs, and moved the mother and fry with their anemone to a separate tank leaving only male fish behind. Now, she is surprised to find that a new female fish has appeared in the original tank. What is the most likely explanation for this?
A. Clownfish are protandrous hermaphrodites that respond to social cues. Removal of the dominant female allowed the second-largest fish to transform into a female. B. Some anemone species secrete pheromones that control the sex of fish as a way to regulate predation. Removal of the anemone allowed a new female to develop. C. Clownfish synchronize their mating based on seasonal cues indicated by salinity. When she replaced some of the tank water, the lower salinity caused the fish to change into a female. D. In urban areas, tap water is polluted with contamination from endocrine disruptors such as BPA and PCBs. When she removed some of the tank water for the new tank, she should have replaced it with bottled water.