Why do public health workers worry about sna 8 Trematodes like the liver fluke i

Question

Why do public health workers worry about sna 8 Trematodes like the liver fluke inhabit humans and other vertebrates. Why do public health workers worry population size in relation to human infections? A the snails are a site of asexual multiplication in the fluke life cycle B. the snails are an alternate host for the adult flukes C the sails feed on the flukes and keep the population down D. the snails compete with the flukes to infect humans E the snails are the final host for the adult flukes 9. Gastropods communicate with each other chemically- for example, in some species mating takes place in large aggregation favored a different means of communication in and snails follow the scent toward the mating group. Natural selection fa cephalopods. What was favored? A. vocal signaling systems B. tactile signaling systems C. visual signaling systems D. pheromone based signaling systems E. nothing-cephalopods are alone most of the time 10. Why is it important that gastropods maintain a one-way flow through the mantle cavity? A to bring in fresh water for feeding B. to swim rapidly C. to cleanse wastes from the gills and head D, to make sure that the larva disperse away from the parents E. to make sure that sperm are spread over a wide area group. Based on the shared presence of the 9 (2)+2 microtubule arrangement, to which of the following groups might the common ancestor of the metazoans have belonged? A. bacteria B. flagellate protozoans C. ciliate protozoans D. b & C E. a, b& c 12. Zoologists used to refer to animals as "simple" and '"advanced." Now it is more scientifically accurate to use D "simple" and "complex," since it is the complexity that evolved.B al patric" and A. B sympatric since the reproductive isolation of the species is most important C. "evolved" and "un-evolved," since everything ties together with evolution. te D. "ancestral" and "derived," since some early them but lost complex characters and secondarily became more "simple" if they share common ancestry with each other more recently than 3 Two different monophyletic taxa are termed either one does with another taxa. A. outgroups B. sister groups C. sibling species D. paraphyletic 14. Which kingdom in Whittaker's five-kingdom system must be discontinued and broken up to be compatible with cladistic systematics? A. Plantae & B. Fungi C. Animalia D. Protista

Explanation / Answer

Answer8=B liver fluke is parasite trematode of class platyhelminthes and it infect the liver of many mammals including humans..causing fasciolosis

Definative host is sheep and cattle

Alternate host is snail where intermediate stages occur.

Answer9 c

Cephalopods including octopus during mating season show camouflage and change their skin colour and patter called chromatophore.

Answer10= c

Gastropods maintain one way flow to remove waste from head.

Answer 11=c

metazoans have both flagelletes and ciliate protozoans as ancestors. And both have 9+2 microtubule arrangement

Related Questions

Navigate

• Browse (All)
• Browse W
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.