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- Summoning Moaquitoes Parasites sometimes alter their hosts behavior in a way that increase their chances of transmission to another host. Dr. Jacob Koella and his associates hypothesized that Plasmodium might benefit by making its human host more attractive to hungry mosquitoes when gametocytes are available in the hosts blood. Gametocytes taken up by the mosquito will mature into gametes and mate inside its gut. To test their hypothesis, the researchers recorded the response or mosquitoes to the odor or Plasmodium-infected children and uninfected children over the course of 12 trials on 12 separate days. FIRGURE 21.18 shows their results. FIGURE 21.18 Attracting mosquitoes. The graph shows that the number of mosquitoes (out 100) attracted to uninfected children, children harboring the aseoual stage of Plasmodium, and children with gametocytes in their blood. The bars show the average number of mosquitoes attracted to that category of child over the course of 12 separate trials. On average, which group of children was most attractive to mosquitoes?Fme Period Asexual and Sexual Reproduction Notes UnY 6 Asemud Reprodketion Type of offepring is * Ocors in met plots, becteria, protists, nd low invertebrates One poren Offepring ore identicel to the porents ketion in whicka new orgrios is prodkced from the porent prorent ond the The Foro Advatages and Disedvantages of Asenud Reprotucion Advatoges-Ldentical to paret, so will get oll Disadvartarps-Identical to parent, so will len get bad characteristics and is less able to to the Types of Asenud Reproduction organiom uses cell division to body parts. * Example starfish, salamander -results in a nen plant that is genetically to the parent plant (a clone). . Examples: strawberry plant, vegyerables, and crops. wd strawery runner to -organism that produces a bud that live on its own. . Example hydraWhich cannot be a symbiosis? a. mutualism b. parasitism c. commensalism d. interspecific competition
- Amnotes ar tehapads Hhat have terrestraly adapled anneie eggs, ofamble which strachrese eggs potet the embryoof reptiles and birds from dessication? Allerb's shell Chorlos Anno Albumen Yok sac Litinl velority of the particle is v(0) = 3, findTapeworms infect which organ system? O Integumentary O None of the listed answers are correct. Gastrointestinal O Circulatory O NervousTesting Biological Control Ant-decapitating phorid flies are just one of the biological control agents used to battle imported fire ants. Researchers have also enlisted the help of Thelohania solenopsae, another natural enemy of the ants. This microsporidian (Section 23.4) is a parasite that infects ants and shrinks the ovaries of the colony's egg-producing female (the queen). As a result, a colony dwindles in numbers and eventually dies out. Are these biological controls useful against imported fire ants? To find out, USDA scientists treated infested areas with either traditional pesticides or pesticides plus biological controls (both flies and the parasite). The scientists left some plots untreated as controls. FIGURE 45.28 shows the results. FIGURE 45.28 A comparison of two methods of controlling red imported fire ants. The graph shows numbers of imported fire ants over a 28-month period Orange triangles represent untreated control plots. Green circles are plots treated with pesticides alone Black squares are plots treated with pesticide and biological control agents (phorid flies along with a microsporidian parasite). 3. If this study had ended after the first year, would you conclude that biological controls had a major effect?
- All prions have which components in their infectious particles? O Nucleic acids and proteins O Proteins only O Internal organelles O Nucleic acids, proteins, and membranes MacBook AirCopy of UNIV113_Habit Home X A ALEKS-Timed Out ezto.mheducation.com/ext/map/index.html?_con=con&external_browser=0&launch Url=https%253A%252F%252Fnewconnect.mheducation.com My UD My Blue Hen Home ▸ YouTube Maps canvas on Apparel, Gifts & T... Quiz 4 ch 12 and 13 i 16 1 points eBook References Mc Graw Hill X ! F1 Are needed in large amounts in diet Non- essential Decide whether or not each of the following terms or phrases characterizes vitamins. Characterizes Vitamins Needed in small amounts in the diet Organic Aid in energy metabolism Essential Reset F2 Aid in the growth, development, and maintenance of body tissues. Inorganic Provide energy Have a single chemical form Not a source of energy # 80 F3 $ Q F4 % F7 eastep4492's pre... X * DII M Question 16-c F8 M NutritionCa F9Prior to its seeming eradication, the dreaded Guinea Worm (Dracunculus), was spread by: contaminated meat contaminated food, contaminated water, or feces O infected ticks O protozoan-laden cone-nosed beetles O protozoan-laden mosquitoes infected fleas infected copepods
- If corals get stressed by too much heat, they will O move to a colder area bleach then die O call their mamas whine about itTesting Biological Control Biological control agents are used to battle red imported fire ants. Researchers have enlisted the help of Thelohania solenopsae, a natural enemy of the ants. This microsporidian (Section 23.4) is a parasite that infects ants and shrinks the ovaries of the colony's egg-producing female (the queen). As a result, a colony dwindles in numbers. Are these biological controls useful against imported fire ants? To find out, USDA scientists treated infested areas with either traditional pesticides or pesticides plus biological controls (both flies and the parasite). The scientists left some plots untreated as controls. FIGURE 45.16 shows the results. FIGURE 45.16 A comparison of two methods of controlling red imported fire ants. The graph shows the numbers of red imported fire ants over a 28-month period. Orange triangles represent untreated control plots. Green circles are plots treated with pesticides alone. Black squares are plots treated with pesticide and biological control agents (parasitoid flies and a microsporidian parasite). How did population size in the control plots change during the first four months of the study?Sustainable Use of Horseshoe Crabs Horseshoe crab blood clots immediately upon exposure to bacterial toxins, so it can be used to test injectable drugs for the presence of dangerous bacteria. To keep horseshoe crab populations stable, blood is extracted from captured animals, which are then returned to the wild. Concerns about the survival of animals after bleeding led researchers to do an experiment. They compared survival of animals captured and maintained in a tank with that of animals captured, bled, and kept in a similar tank. FIGURE 24.28 shows the results. FIGURE 24.28 Mortality of young male horseshoe crabs kept in tanks during the 2 weeks after their capture. Half the animals were bled on the day of their capture. Control animals were handled, but not bled. This procedure was repeated 8 times with different sets of horseshoe crabs. In which trial did the most control crabs die? In which did the most bled crabs die?
