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32 Cards in this Set
- Front
- Back
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In what kind of development does the FIRST embryonic opening become the mouth?
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PROTOSOME development
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How many criteria do biologists use to classify animals?
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Biologists use 5 criteria to classify animals.
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What type of body plan does a SPONGE have?
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A sponge has a SAC BODY PLAN
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What type of symmetry does a sponge have??
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A sponge has NO SYMMETRY!
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What phylum does a SPONGE belong to?
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A sponge belongs to PHYLUM PORIFERA
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Why are natural bath sponges so absorbent and such good scrubbers?
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They have an absorbent type of protein called SPONGIN and silica spicules which is a good exfoliant & good for cleaning
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What are spicules made from?
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Spicules are made of silicia or calcium carbonate
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What is budding?
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Budding is when a small sponge grows on a larger one and then breaks off to settle on the bottom and grow into a new sponge. (Fragmentation)
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Why does a sponge reproduce sexually if budding is so easy?
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A sponge releases eggs and sperm into the water in vast numbers and relies on chance... I guess the vast #'s is why they do it sometimes.
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What structure is unique to CNIDARIANS?
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CNIDARIANS have a unique structure known as CNIDOCYTE
- a specialized STINGING cell |
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What is a POLYP?
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- A polyp sits on substrate and points its tentacles UP!
Ex: Hydra; coral; sea anenome |
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What Cnidarians have dominant polup stages?
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Sea anenome, coral, and hydra have dominant polyp stages
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What is a MEDUSA?
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- Tentacles point down
Ex: Jellyfish |
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Why do CNIDARIANS have to produce a huge number of sperm and eggs?
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Because they have to rely on chance so they need to produce a lot
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Should you touch a dead jellyfish or a Portuguese man-of-war if you see one on the beach?
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NO- because you don't want to be STUNG!
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Did the live Planaria move towards or away from the light?
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It moved away from the light.
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What structure serves as both the mouth and anus in Planaria?
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SAC PLAN
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What animal is part of the fluke's life cycle besides humans and the fluke itself?
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Fish & Snail
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What is a hydrostatic skeleton?
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This is when a liquid acts as a form/strength of the structure.
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What two organ systems are absent in Platyhelminthes because they use diffusion instead?
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Platyhelminthes have no respiratory or circulatory systems because they use diffusion instead.
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What type of body plan do nematodes have?
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Nematodes have a tube-with-in-a-tube plan
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How can you tell if an Ascaris is a male or female?
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Males have curved tails
Females have straight tails |
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How can you prevent roundworm infections?
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Cook Pork throughly.
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What is an Ascaris?
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An ascaris is a parasitic roundworm
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What is a Trichinella?
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It is a roundworm; a parasite that causes serious infections when humans eat improperly cooked pork.
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What are NEMATODAS?
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Nematodas are roundworms and contain some very dangerous parasites - Arcaris, Enerobios, et.
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What are Annelida?
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Annelida are segmented roundworms like earth worms, leeches, and marine worms.
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What is the function of septa?
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The function of septa is to provide a hydrostatic skeleton.
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What is protostome development?
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Development where the first embryotic opening becomes the mouth
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What is the function of the clitellum?
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It helps cross-fertilization
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How many hearts do earthworms have?
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Earthworms have 5 hearts.
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What is the function of hirudin?
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An anticoagulant that keeps the blood flowing.
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