Biology 3475A/B Lecture : Bio 3475 Lec 2.docx

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ochrewombat575

26 Apr 2012

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Plants and animals use infochemicals to acquire resouces. The fast-growing ones do not attract them as much; they like them but do not need them. The parasitic ones attract them a lot more (see graph) it is related to the # of nematodes there. The more fungi, the more nematodes (see graph) When the nematode goes into the fungi, the fungi spreads spores onto the nematode. Limited amount of nematode so the infected nematode do not respond as much to other fungi which is a good strategy so the resource is not overexploited. Fungus canidia treated with an enzyme that could come with the fungus reduction in response. Arbuscular mychorrhizal signaling: goes into the root, releases something, and at the same time is absorbing nutrients. Plant has a system to defend itself from pathogens. It is producing its own lactone that varies fungi responds to that, plant detects signal and lets their guard down to let stuff in.

Related Questions

We sometimes find nematodes of unknown species in the digestivetract of bluegill that we dissect. Are these worms parasites orcommensals? Write a short essay that indicates the differencebetween these two species relationships. If the nematode is acommensal, what benefit might it derive from living within afish?

crimsonmammoth34

1. Two adaptations that land plants have for minimizing waterloss are _______ and ________.

2. Which of the following types of plants have the followingcharacteristics: originated 360 million years ago (mya), produceseeds that are not in specialized chambers, were abundant duringthe age of dinosaurs?

seedless vascular plants

bryophytes

angiosperms

gymnosperms

3. Not every angiosperm has invested in attractingpollinators.

True

False

4. It is a common misunderstanding that lichens are a singleorganism. However, lichens are actually a symbiotic association of_____ and _______.

5. Which of the following types of animals does not have radialsymmetry?

all of the above have radial symmetry

arthropods

molluscs

nematodes

6. Nematodes and humans both have ______ symmetry.

7. Almost all of birds' adaptations are for ______.

redwalrus511

Zoonosis

DISCUSSION

1- While on a romantic getaway with your significant other on the beautiful southern coast of Italy, you enjoy lots of local fish. After too much Chianti, you show off to your new Italian friends how to eat fish âsashimi styleâ (raw!). Within weeks you develop crippling explosive diarrhea which causes your significant other to question the entire relationship. What trematode infection is consistent with this scenario? What other pathology may be associated with this parasite.

2- Why do ants fear Dicrocoelium dendriticus?

3- Describe the process of egg production in trematodes

4- What is the difference between a âreservoir hostâ and a âparatenic hostâ? Define both terms and describe the role of each in the life-cycle of a trematode.

Megalodiscus temperatus is an interesting parasite that exhibits alternative life cycle strategies. Describe those strategies. What might be some costs and benefits associated with each strategy??

6- Trematodes have an excretory system that can be especially well developed in some larval trematode stages. In these larval stages, this system also has an osmoregulatory function. Describe the excretory system of trematodes and list those larval stages in which you would expect that system to have a osmoregulatory function, then explain why?

7- You go to Minnesota for summer vacationâ¦why you would go there, I am not sureâ¦but you go, and after an early morning swim in a local lake, you begin to itch and develop small red spots all over your body. Tell me the what, the who and the how

8- Which group is considered the sister taxa of trematodes? what evidence suggests that relationship?

9- Describe the pathology of Paragonimus westermaniand how we can become infected with this parasite

Describe the pathology of Clonorchis sinensis and how we can become infected with this parasite

Describe the pathology of Fasciolopsis buski and how we can become infected with this parasite

coffeebeetle651

Biology 3475A/B Lecture : Bio 3475 Lec 2.docx

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