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BIOB50 lec 6 review

QuestionAnswer
Life history? record of an organisms life events relating to growth reproduction development and survival
3 characteristics of life history? -age and size at sexual maturity -amount and timing of reproduction -survival and mortality rates
life history strategy? avgs of life history within a species. det.ed by how splits time and resources for growth reproduction and survival
phenotypic plasticity? organisms with the same genotypes may in different environments exhibit different traits/phenotypes
morphs? distinct forms created through phenotypic plasticity
polyphenism? when a single genotype has many morphs.
asexual reproduction? what and who? cell division, done by many protists and all prokaryotes. some multicellular organisms do both asexual and sexual reproduction.
simple vs complex life cycle? simple has no abrupt transitions, whereas complex have at least 2 distinct forms in which the body forms are different and the environment may be as well.
metamorphisis abrupt change from larvae to juvenile stage of life
semelparous vs iteroparous can reproduce once, can reproduce many times
R vs K selection? r- rapid devel. low invest, high pop growth, short life span k-slow growth, high parental invest, slow pop growth, long life span, low reprod rate,effic reprod favored.
Stress? for plants anythign that reduces vegetative growth
Disturbance for plants? anything that reduces biomass of plant in question
propagules? seeds/eggs
when resources are primarily used on early reproduction what happens vs late reproduction? reproduce at smaller size with less offspring
what 3 factors did we learn about in class that affect how life cycles evolve? competition, predation, environmental conditions
dispersal vs parental investment? both can help with stressful envs, one via anothers aid and the other via fleeing said env. and reducing comp with close relatives
dormancy? another way to cope with stressful envs via going into a state of suspended growth and development in which it's easier to survive
TRUE/FALSE Dormancy is only seen in seeds, spores, eggs and embryos. false, although best suited larger animals may enter dormancy as well.
Niche shift age or size dependant change in organism's function/habitat.
Created by: mmya
 

 



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