Ways in which a resistant form of infectious disease can re-emerge include A when the vectors are altered through mutation B natural selection Cexchange of genetic material among strains and species D A and C All of the above
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- Part 2: Applying the Scientific Method As reviewed in the lesson, various factors can potentially affect the rate of photosynthesis: 19 smiT axaid to 1sdmun smiT 1. In one to two sentences, state a variable that could affect the rate of JuniM) photosynthesis. St 81 er OS 2. Propose a hypothesis about how this variable will affect the rate of photosynthesis. VE 81 ©2018 Pearson Online & Blended Learning K-12 USA. All rights reserved. et OS 0214 0213 to noitonut s as pritson exalb to 19dmun srl pniwoda ys22s 190 to 19 of 291 961 bns loodston muoy ni 291pit or web no voy (291unim) smid woled merli bsolqu 3. Define the control and treatment groups. 4. Write a short paragraph that explains how a floating leaf disk assay can be used to test this hypothesis. Include what materials will be used. 63 4 6 7. In many viral diseases (e.g., smallpox, mumps and influenza), illness occurs shortly after exposure to the virus. In others (e.g., HIV AIDS), the victim may not show symptoms for many years following the initial infection. How would you explain the difference in these situations? étv %24 & 4 R T Y] F KA "snowball-effect" type of epidemic where infected people spread the infection to other people over time, is called a epidemic. O Point-source O Propagated O Common-source
- Mouse Infection A model for the spread of an infectious dis- ease among mice is NP = rN - ar(a + b + v) dt b + y, where N is the size of the population of mice, a is the mortal- ity rate due to infection, b is the mortality rate due to natural causes for infected mice, B is a transmission coefficient for the rate that infected mice infect susceptible mice, v is the rate the mice recover from infection, and y is the rate that mice lose immunity. Show that the solution to this equation, with the initial condition N(0) =(a + b + v)/B, can be written as (a + b + v), 2{(R – a)e" + a], BR N(t) = where R = a - (1+, b + yThe antelopes from Africa were delivered to the Kiev's zoo. The protozoans Trypanosoma gambiense were found during laboratory investigation of their blood. Are these animals epidemiologicaly dangerous? Select one: a. Dangerous only to predators O b. Dangerous to domastic animals and human O c. Are not epidemically dangerous at all O d. Dangerous only to human O e. Dangerous to other antelopesWhich of the following is not a major cause of spread of infectious diseases in human populations? O a. A settled life style. O b. Marriage patterns. Oc. Domestication of animals O d. Agricultural production patterns, irrigation and fertilization of soil. Oe. Climate.
- What are the key assumptions in simple SIR modeling of infection dynamics? (check all that are correct): No vaccines are in use. more than one type of host can be incorporated (vector, animal, etc.) V All hosts can fit into one of the three compartments ONo hosts are susceptible. Recovered subjects cannot be reinfected. O Hosts die and are removedrom the model. O The population is static (not increasing or decreasing).Explain how the question “how do we keep new diseases from emerging?” Connects to this question “what are the most common COVID vaccine myths and how did they start?”Abiogenesis refers to thea. spontaneous generation of organisms from nonliving matterb. development of life forms from preexisting life formsc. development of aseptic techniqued. germ theory of disease
- Which form of viral infection is described by this example? Long-term human papillomavirus (HPV) infection, during which a person shows few symptoms but is constantly producing low numbers of infective viral particles and can transmit the disease. O Latent infection O Persistent infection O Acute infection MacBook Air DII 888 ニ。 F11 吕0 F7 FB F9 F6 F5 F3 へ & %23 $ % 7 8 3e virus use the inus Two types of regroduction 1. Lytic- ight- and 1. membrane Virus binds to receptors on the cell 2. 3. Viral DNA takes over activities of tthe cell 4. New viral DNA is made from old cell DNA 5. New viruses are assembled virus The cell bursts yses) releasing the new 2.Lysogenic- "sooo 1. Virus binds to receptors on the cell membrane. 2. Viral DNA takes over the activities of the cell. 3. - Viral DNA embedded into the host's DNA. 4. New viral DNA is made from old cel DNA. Lysogenie eyele 5. New viruses are assembled. Lytte 6. The cell bursts (lyses) releasing the newvirus. Viral Disease 1. Occurs by the body's normal and through 2. Always 3. Diseases can be in humans, plants, animals, and bacteria Key Types of Viruses virus for Bacteria (rarely human) virus with 1. instead of DNA 2.Suppose that the health department of city A mounts a suc-cessful campaign to get children immunized against measles.Only 100 out of 10,000 children fail to receive the vaccine. Nowsuppose that city B, the same size as city A, has not carried out asuccessful measles vaccination program. Of the 10,000 childrenin city B, 5,000 had measles when the disease last struck thepopulation.(a) If a child with measles moves to city A, what is thechance that child will encounter a susceptiblechild?(b) If a child with measles moves to city B, what isthe chance that child will encounter a susceptiblechild?(c) Comparing the two scenarios, which city has thehigher herd immunity, and in which city is aninfected child more likely to transmit the diseaseto a susceptible child?