BIOB50 lec 6 review
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| Life history? | record of an organisms life events relating to growth reproduction development and survival
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| 3 characteristics of life history? | -age and size at sexual maturity
-amount and timing of reproduction
-survival and mortality rates
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| life history strategy? | avgs of life history within a species. det.ed by how splits time and resources for growth reproduction and survival
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| phenotypic plasticity? | organisms with the same genotypes may in different environments exhibit different traits/phenotypes
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| morphs? | distinct forms created through phenotypic plasticity
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| polyphenism? | when a single genotype has many morphs.
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| asexual reproduction? what and who? | cell division, done by many protists and all prokaryotes. some multicellular organisms do both asexual and sexual reproduction.
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| 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.
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| metamorphisis | abrupt change from larvae to juvenile stage of life
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| semelparous vs iteroparous | can reproduce once, can reproduce many times
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| 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.
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| Stress? for plants | anythign that reduces vegetative growth
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| Disturbance for plants? | anything that reduces biomass of plant in question
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| propagules? | seeds/eggs
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| when resources are primarily used on early reproduction what happens vs late reproduction? | reproduce at smaller size with less offspring
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| what 3 factors did we learn about in class that affect how life cycles evolve? | competition, predation, environmental conditions
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| 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
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| 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
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| TRUE/FALSE Dormancy is only seen in seeds, spores, eggs and embryos. | false, although best suited larger animals may enter dormancy as well.
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| Niche shift | age or size dependant change in organism's function/habitat.
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