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27 Cards in this Set
- Front
- Back
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Unity |
All heterotrophic and multi-cellular |
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Essential functions |
Eat, breath, excrete, reproduce |
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Many have to |
Respond/move, internally transport material |
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As animals evolved |
Cell organisation became specialized, nervous system became concentrated on end (cephalization), symmetry became bilateral (cut in half) |
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Sponges |
Been around for 500 million years, flagellation cells create a current that draws water in through pores |
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Mollusk unity |
Trochophore larvae, soft bodied with shells,open circulatory system, many feed using radula |
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3 groups |
Squid (cephalopods), clams (bivalves), snails (gastropods) |
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Arthropods |
Huge, many forms, evolving for millions yrs, |
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4 groups |
Crustaceans, spiders, trilobite, insects |
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Evolution |
Appendages became more specialized, number of segments decreased |
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3 common factors |
Exoskeleton made of chitin, segmentation, joint appendages |
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Growth |
It outgrows exoskeleton leads to molting, sometimes metamorphosis occurs |
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Vertebrates (Phylum chordata) |
Have strong dorsal backbone that protects a spinal cord |
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Different types |
Mammals, birds, fish, amphibians, reptiles |
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Fish |
Aquatic vertebrates with scales and gills. |
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3 main types |
Jawless (lamprey), cartilagenous (great white) boney (clown fish) |
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Unity |
Obtain oxygen using gills, have well developed nervous system |
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Diversity |
Have different feeding methods, reproduce differently |
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How are a cray fish and trilobite related? |
They come from the same Phylum and have similar features eg exoskeleton appendages and segments |
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Why are jaws and parked fish important to the evolution of fishes |
Jaws enable the fish to nibble in plants or other animals or to defend themselves and paired fins help then steer to be more agile and escape predators |
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Fins |
Dorsal=stabilizing, pectoral=steering, pelvic=steering, anal=stabilizing, caudal= propulsion |
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Heart chambers |
Fish have 2, amphibians have 3, reptiles have 4 with a hole so it's like having 3 |
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Oviparous |
Species that lays eggs that develope outside body |
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Ovoviviparous |
Young Develope inside body but not nourished there |
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Viviparous |
Species that bears living young that are nourished by mothers body |
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How sponges gets stuff |
Collar cells pull in water and water exits through pores cells and osculum. This current of water delivers food/ oxygen to sponges cells |
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Trochophore larvae significance |
Taxonomy= all mollusks have larvae That look the same ecology= they make up plankton which are primary consumers at bottom of food chain |
