BIO 2135 Lecture 12: Lecture 12 - arthropods
2 Mar 2017
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He marked out of 72 instead of the normal. Class average of 60% (then 69% taking out the low ones) Without the failing people, average is almost 70% Mc jelly like layer in sponge, supposed to be mesohyle not mesoglea. Will get mark right for either one either 2. 10 or 2. 19. Come on land to feed on dominating insects. Distribution, ice crickets, hot springs, ocean, deserts, global. Impact on man, disease vectors, malaria, flea diseases, agriculture. Crustacea first even thought they aren"t the bottom. Filtering blood with metanephridia, keeps them in either antennal or maxillary segments, ancestor probably in every segment. Shape is different than normal, no cavity in crusties, use membrane to make a sac. 5 segments for head and then repeating structures. Because of shape, it will pull and push water. When boxes are pulling back for recovery, the base of appendages scrap forward. Trunk segments are specializing, helping in manipulating food.
