BIO205H5 Lecture Notes - Interspecific Competition, Logistic Function, 1Time Airline
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21- Define carrying capacity and understand how it can affectpopulation size. |
22- Compare and contrast density-dependent and densityindependent factors that affect population growth. |
23- Compare and contrast opportunistic and equilibrium lifehistory adaptations. |
24- Explain the interactions in communities and ecosystems. |
25- Compare and contrast competition, mutualism, commensalism,parasitism, herbivory, and predation. |
26- Describe competitive exclusion. |
27- Explain how species interactions can lead tocoevolution. |
28- Describe and give examples of the importance of keystonespecies. |
29- Compare and contrast primary and secondary succession. |
30- Explain the roles of producers, consumers and decomposers inan ecosystem. |
Consider a species that can switch between two phenotypes: W is a weak competitor phenotype, C is a strong competitor phenotype. Like the tadpoles, this species typically expresses the W phenotype until it senses a competitive environment, at which point it switches to C (“competition-induced plasticity”). If C individuals more effectively compete for resources, why aren’t all individuals C always (why is W the default)? Choose correct answer 1. Traits that improve competitive ability are often costly in low-competition environments |
2. C individuals are limited by strict social organization, which favors W phenotypes |
3. C individuals don't have the necessary mutations |
4. C and W individuals have different genes and cannot easily switch except through mutation |