16. Host-Parasite Models Develop appropriate models of the two host-parasite scenarios suggested. HINT: You can adapt the predator-prey model. (a) Consider a species of insect that depends for survival on a plant on which it feeds. It is to the advantage of the insect to keep the hosts alive. Write an appro- priate system of differential equations for the parasite population P(t) and the host population H(t). (b) How might your model adapt to the study of diseases caused by parasitic organisms?

C and D please

39. Mites are common pests on individual fence lizards. Mites are observed to bite fence lizards to draw a blood meal, which increases mite population growth rates. Fence lizards respond by scratching their heads to remove mites. The population growth rate of fence lizards is not impacted by this interaction although it appears to be negative for the fence lizards that have mites. What is the best explanation to account for the population growth pattern in fence lizards.   a. the interaction is a +, - interaction b. the interaction is at the organism level c. the interaction is a altruism d. the interaction is at the population level e. the interaction is a mutualism

What are the negative effects of shark finning on the ecosystem? (Please be specific and answer in paragraph form)

5) Peters et al. (2016) examined the impact of different human diet scenarios on the carrying capacity of the human population in the United States. The "baseline diet" is the current average diet of Americans which includes a high proportion of meat and dairy products. The study compared the baseline diet to a vegetarian diet (which includes both egg and dairy products) and five omnivore diets. The 100% omnivore diet scenario proposed that 100% of Americans are eating a healthy diet including meat, dairy, and vegetables with the primary source of protein coming from meat products. The other omnivore diet scenarios decrease the proportion of US population eating meat products and increasing the proportion of people on a vegetarian diet (no meat products consumed). For instance, the 60% omnivore diet scenario assumes that 40% of the US population is vegetarian. Below is a graph showing the predicted carrying capacity of the United States under these different diet scenarios. Human…

Draw on one graph, with N2 on the y-axis and N1 on the x-axis, the isoclines for the twocompetitors with the carrying capacities and competition coefficients listed below. Will thesespecies coexist? If not, which species will win? Competitor 1                                           Competitor 2 K1 = 200, α12 = 0.4                                 K2 = 400, α21 =1

Please answer the question attached

1. Using the information in Section 2 of SimUText's How Diseases Spread, what is described by the movement of people between compartments in the SIR Model? A. Change in location. B. Change in risk of infection. C. Change in mortality rate. D. Change in health status. E. Change in mutation rate.   2. For an SLR disease trait, in a parental cross where the male is unaffected and female is affected, the proportion of offspring that are affected and male is: A. 0 B. 0.25 C. 0.5 D. 0.333 E. 1

41. The introduction of the parasitic wasp A. melinus in 1957-59 to control the red scale pest resulted in the elimination of the parasitic wasp A. lingnanensis from the central valley of California but not from coastal areas. This pattern results from…   a. a lack of resource partitioning between the two species of wasp b. differences in the realized niches of the two species of wasp c. similar habitat in the central valley and in the coastal areas d. None of these choices are correct e. differences in the fundamental niches of the two species of wasp