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- define interspecific competition. explain how insects reduce intraspecific competition between adults and offsrpings.Explain how zooplankton avoid predation through vertical migration.Invasive species often display a wave of advance as they colonize new areas. Mathematical models based on random dispersal and reproduction have demonstrated that the speed with which such waves move is given by the expression 2Dr, where r is the reproductive rate of individuals and D is a parameter quantifying dispersal. Calculate the derivative of the wave speed with respect to the reproductive rate r and explain its meaning.
- All of the following are true of primate dispersal, EXCEPT: It helps prevent inbreeding Most transfers of males occur during the breeding season the philopatric sex is the one that disperses Joining a new group can be difficult and have high costs to the new individualWhich statement about dispersal is false?(A) Dispersal is a common component of the life cycles ofplants and animals.(B) Colonization of devastated areas after floods or volcaniceruptions depends on dispersal.(C) Dispersal occurs only on an evolutionary time scale.(D) The ability to disperse can expand the geographic distribution of a species.Give examples of evolved defenses against predation andherbivory.
- Describe the predation strategy (i.e., actively searching or ambush) of zebrafish under a well-lit environment.How does a defense mechanism (behavioural, cryptic colouration, protective colouration, mimicry) affect predation and competition? a) Provide an example of a defense mechanism that you have not encountered in the course or in the online assignments. Include an image depicting the defence mechanism, describe the defence mechanism and cite your sources. b) Hypothesize how this defence mechanism may have evolved over time due to pressure from predation and/or competition.Give examples of adaptations of plants and animals that allow them to avoid competition (e.g., plants flowering at different times of the year, birds foraging in different parts of a tree).
- Explain what happens to species with lower resilience compare to species with higher levels of resilience Explaindescribe the various eco-morphological and behavioural adaptations and strategies of Hemisus marmoratus (marbled snout-burrower) to survive in its environmentWhat happens if species with incomplete reproductive barriers come into contact with one another?