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Lecture 52

BIOL 1010 Lecture 52: Lecture 52
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Department
Biological Sciences
Course
BIOL 1010
Professor
Emily A.Mc Kinnon
Semester
Fall

Description
OS82 Bio 1010 Millipedes are wormlike terrestrial creatures that eat decaying matter. Only 2 pairs of short legs per body segment. Centipedes are terrestrial carnivores with poisonous claws used in defence & to paralyze prey (cockroaches & prey). Each body segment bear single pair of long legs. Crustaceans Nearly aquatic. (Lobsters , crayfish, crabs, & fish) Barnacles – with cuticle that Is hardened into shell containing calcium carbonate. Jointed appendages project from shell to strain food from water. Most anchor to objects. They produce adhesive stronger than any glue. Copepods & Krill – serve as food sources for fish & whales. Characteristics Arthropods have in common: Segmentation o Exoskeleton o Specialized jointed appendages Section 20.12 – Insects are the most successful group of animals. Characteristics for success of insects: Similar to Arthropods – body segmentation, exoskeleton, & jointed appendages. Flight, waterproof coating on the cuticle, & complex life cycle. Short generation & large offspring’s. Natural selection acts rapidly, & alleles offer reproductive advantage can be quickly established in population. Life cycles Metamorphosis – animal takes on
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