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zoo boo 1 Cnidarians
zoo boo 1
| Question | Answer |
|---|---|
| Cnidaria Have _____ symmetry, _________, Have a ___________ digestive system, ______ cells but no ______, and _______ | Radial, diploblastic, incomplete, nerve, brain, muscle |
| Cnidarians nerve cells are _______ or ________ synapses | non polar or bidirectional |
| Have both ________ and ________ digestion | intracellular and extracellular |
| Loss of medusa stage in some groups. _______ stage releases egg or sperm and _____ settles to form a new _______ stage | hydroid, planula, hydroid |
| Large complex hydroid | Sea anemones |
| Freshwater hydroid | Hydra |
| a small colonial polyp that exhibits polymorphism | Obelia |
| Part of a cnidarian that uses tentacles for prey | Gastrozooids |
| life cycle of cnidarians | medusa from the polyp of the cnidarian bud off and produce eggs or sperm to create a fertilized egg, then a zygote, then a planula, and divides into the polyp body and form multiple polyps (obelia) by asexual reproduction, that can repeat the cycle. |
| Physalia - Portuguese man-o-war | a pelagic (floating) colonial hydroid, not a medusa. |
| _________ reproduction plays an important role in a cnidarians life | asexual |
| The skeleton of a cnidarian is_______ and 3 things about it | Coral: Colonial cnidarians, Interconnected gastrovascular cavity, Produce a supporting skeleton. |
| sea fans and sea whips. Polyps connected by tubula gastrovascular cavities, 8 branched tentacles. Polyps can withdraw into a fleshy tissue, internal flexible protein skeletal rod. | Soft Corals |
| Polyps connected by sheet like gastrovascular cavities, many unbranched tentacles, external skeleton of calcium carbonate. | Hard Coral |
| Coral reef's have a symbiotic relationship with ________ _________ _______ | Single Cellular Algae |
| Biotic Benefits for algae in coral reefs | Nutrients and protection |
| Biotic Benefits for coral having algae | added food and oxygen, increased rate of limestone deposition due to less acidity in coral tissue.Coral tissue produces Carbonic acid from CO2 and the algae uses CO@ as a source for photosynthesis and removes this lowering the acidity of coral's tissue. |
| Abiotic factors: necessary for algal growth | 20 C or warmer. 30 N and S of the equator. Light: depths of 60m or less. shallow waters off continents and near volcanoes. |
| project seaward directly from the shore of an island or continent. | Fringing reef |
| separated a greater from the shore by a lagoon | Barrier reef |
| A roughly circular ring of islands formed of coral rock deposited around an extinct, sunken volcano and separated lagoon | atoll |
| region where sediments, reduced wave action, warmer temperatures, and lower oxygen levels interfere with coral growth. | lagoon |
| Conditions that threaten coral | sediments, pollutants, temperatures that are too warm: cause corals to expel their symbiotic algae, a phenomenon called “coral bleaching”. |
Created by:
wil96