a. Why is it necessary for most parasites to leave their host tocomplete the life cycle?b. What are some ways to prevent completion of the life cycle?c. What is the benefit to parasites of having numerous hosts?d. What are the disadvantages in having more than one host?

Do parasite-host systems tend to be host-specialist or generalist? Explain.

1.) Algae and fungi have a symbiotic association in lichen. A controversy exists over the type of symbiotic association occurring in lichens. While some researchers are of the view that the association is a type of parasitism, most researchers believe that the symbiotic association between algae and fungi in lichen is A.) ammensalism B.) mutualism C.) neutralism D.) commensalism 2.) Which of the following statements about intraspecific competition is not correct? A.)Intraspecific competition exists between members of the same species. B.)Species members compete for food. C.) Species members compete for space. D.) Species members do not compete for the opportunity to breed. 3.) Population 1. Randomly mating population with immigration and emigration Population 2. Large breeding population without mutation and natural selection Population 3. Small breeding population without immigration and emigration Population 4. Randomly mating population with mutation and emigration Which of the…

What kind of ailment can algal (algae) toxins cause? a. disease caused by a neurotoxin b. anthrax c. purple tide d. none

How common is parasite-driven host extinction? Why does it occur with this frequency given what you know about parasites evolutionarily?

Which of the following statements correctly describes exotoxins and endotoxins produced by various bacteria? A. endotoxins are secreted into the environment while the bacteria are still alive B. exotoxins are secreted into the environment while the bacteria are still alive C. exotoxins are only released into the environment when the bacteria die and their cell walls break down D. exotoxins are components of the outer membrane of the bacteria that produce them

Identify from the list below the protists that function almost like multicellular organisms when food is depleted, forming a multicellular mass that forms fruiting bodies.   A. slime molds   B. oomycetes   C. cercozoans   D. diatoms

Most Americans, including some health care professionals, think that parasites are a problem of the third world. Why do you think that is?  In your opinion, why this is ignorant and dangerous.

Give some example of organism which are partial parasties or total parasites.

10) Which of the following statements about the response of hosts to parasitic infections is FALSE?   Question 10 options:     Grooming by mammals and birds is a defense against parasites.     If a parasitic infection occurs, the body often responds with an inflammatory defense, releasing histamines.     Some forms of defense against parasites are behavioral, such as deer avoiding deerflies by seeking dense, shaded areas.     An antibody response is the first line of defense when a parasitic infection occurs.     Plants cut off contact between fungal parasites and healthy tissue by forming cysts or scabs.