31. Invertebrates
Porifera and Cnideria
31. Invertebrates
Porifera and Cnideria
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- Multiple ChoiceSponges feed by __________.
- Multiple ChoiceSponges lack __________.
- Multiple ChoiceSome digestion in sponges takes place in the __________.
- Multiple ChoiceWhich of the following is/are characteristic of sponges?
- Open QuestionWhich of these characteristics does not apply to cnidarians?a. are diploblasticb. possess a gastrovascular cavity with one openingc. undergo metamorphosisd. have a central nervous system
- Open QuestionJon found an organism in a pond, and he thinks it's a freshwater sponge. His friend Liz thinks it looks more like an aquatic fungus. How can they decide whether it is an animal or a fungus?a. See if it can swim.b. Figure out whether it is autotrophic or heterotrophic.c. See if it is a eukaryote or a prokaryote.d. Look for cell walls under a microscope.
- Open QuestionWhich of these characteristics does not apply to cnidarians?a. are diploblasticb. possess a gastrovascular cavity with one openingc. undergo metamorphosisd. have a central nervous system
- Open QuestionWhich of these choices is an example of homology (similarity due to common ancestry)?a. suspension feeding in sponges and clamsb. ectoparasite lifestyle in aphids and ticksc. cnidocytes (stinging cells) in jellyfish and sea anemonesd. radial symmetry in cnidarians and echinoderms