Biology 3484A/B Lecture Notes - Lecture 20: Eusociality, Thermogenesis, Ecosystem Services
21 Apr 2018
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Pollination: coevolution of angiosperms and insects: pollination, flowering plant (angiosperm) sexual reproduction, plants get sex, insects get food interdependency of unrelated taxa, plants need a secondary species to fertilize. Inse(cid:272)ts pollinate (cid:271)y (cid:862)a(cid:272)(cid:272)ident(cid:863: ovule fully enclosed in tissue/ovary, ovules become fertilized and develop into embryos, then seeds, which are enclosed within the fruit, stigma longer than stamen, e. g. Ecosystem function depends on pollination: ecosystem services - ecosystem function depends on pollination, and we depend on ecosystem functions, natural e(cid:272)os(cid:455)ste(cid:373)s (cid:894)(cid:271)iodi(cid:448)ersit(cid:455)(cid:895) are hu(cid:373)a(cid:374)it(cid:455)"s life support s(cid:455)ste(cid:373) Insect antennae: chemoreception: extraordinary sensory perception, excellent colour and uv vision. Insect mouthparts: specialized for type of food, bees: mandibles to grab and hold pollen and tongue is modified mouthparts for specialized feeding: lapping up nectar of flowers, e. g. Leps: adults are important pollinators: proboscis in action: native tiger swallowtail butterfly drinks nectar from milkweed, their mouthparts are in collopian tube, e. g.
