FOR402 Ass 1

FOR402 Ass 1 - Wood lice (Gribbles) damage wooden...

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Philip Mead ENT 402 Assignment 1 1) Important characteristics of anthropods: Segmented body with two or three body regions Paired segmented appendages Chitinous exoskeleton Ventral nervous system Open circulatory system Respiration through gills or spiracles and tracheae Excretion by means of malpighian tubules Bilateral symmetry Striated skeletal muscles 2) Arachnids pose as both a threat and an ally to foresters. Ticks and spiders can be harmful to humans and are a threat to foresters when working in the woods. Spiders help control insect populations in forest systems. Mites can be important pests and predators of small insects. 3) Importance of Crustacea: Are a good indicator of forest ecosystem health Sowbugs feed on decaying plant and animal matter but can be pests
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Unformatted text preview: Wood lice (Gribbles) damage wooden structures Importance of Diplopoda: Feed on decaying plant material Some attack living plants Some predators Importance of Chilopoda Some can be dangerous to humans Predators of insects, spiders, mites, nematodes, and mollucks 4) Insects external structures: Segmented body head, thorax, and abdomen Three pairs of legs One or two pairs of wings One pair of antennae Insects are divided into different orders based on mouthparts, wings, metamorphosis, size and shape, antennae, and other structures. Questions: 1. Why are almost all insects in the class Crustacea found in marine ecosystems? 2. Are the black widow and brown recluse the only two poisonous arachnids?...
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This note was uploaded on 03/31/2008 for the course ENT 402 taught by Professor Hain during the Spring '08 term at N.C. State.

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