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What are 3 types of symmetry
- Bilateral like cockroaches you can cut them in half.
- Radial like jellyfish they are a circle.
- No symmetry.
Compare the open circulatory system of a clam with the closed circulatory system of an earthworm.
- In a closed circulatory system like the earthworm blood/oxygen flows from the heart splits up to travel to each organ and loops backs to the heart. An open system found
- in clams and grasshoppers, oxygen flows to the heart then splits up to the
- organs. Instead of true blood some species have hemolymph.
Describe the different life cycle stages in incomplete and complete metamorphosis.
Incomplete metamorphosis only has three life cycle stages: egg, nymph, and adult. Complete metamorphosis has four distinct life cycle stages: egg, larva, pupa, and adult. The larva can be very different from the adult. The larvae eat constantly and grow rapidly.
Define protostome and deutorostome.
During an embryo's development a hole called a blastopore develops. In a protostome the blastopore becomes the mouth first. In a deutorostome the blastopore becomes the anus first.
What are these and what types of symmetry to they have?
- Porifera (sponge, no symmetry)
- Cnidaria (jellyfish, radial)
- Platyhelminthes (planarian, bilateral)
- Annelida (earthworm, bilateral)
Identify the water flow in a sponge.
Identify parts of the Planaria
Identify types of planes of dissection.
What is this and identify the parts?
- Shark Brain