01:125.5.4 Distinguish between Porifera, Cnidaria, Platyhelminthes, Annelida, Mollusca and ArthropodaStephanie Castle6711
Multiple ChoiceWhich of the following features is characteristic of the poriferan (sponge) body plan or life history? 178
Multiple ChoiceSome cnidarians go through both a motile stage and a sessile (attached) stage during their life cycle. The attached stage is called a(n) __________. 189
Multiple ChoiceThe choanocyte of a sponge and the nematocyst of a cnidarian both function in __________. 377
Textbook QuestionWhich of these characteristics does not apply to cnidarians? a. are diploblastic b. possess a gastrovascular cavity with one opening c. undergo metamorphosis d. have a central nervous system563Has a video solution.
Textbook 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.118Has a video solution.
Textbook QuestionWhich of these characteristics does not apply to cnidarians? a. are diploblastic b. possess a gastrovascular cavity with one opening c. undergo metamorphosis d. have a central nervous system129Has a video solution.
Textbook QuestionWhich of these choices is an example of homology (similarity due to common ancestry)? a. suspension feeding in sponges and clams b. ectoparasite lifestyle in aphids and ticks c. cnidocytes (stinging cells) in jellyfish and sea anemones d. radial symmetry in cnidarians and echinoderms108Has a video solution.
Textbook QuestionThe smooth feathers on the back of the neck in pigeons can be reversed by a mutation to produce a 'crested' appearance in which feathers form a distinctive spike at the back of the head. A pigeon breeder examined offspring produced by a single pair of non-crested birds and recorded the following: 22 non-crested and 7 crested. She then made a series of crosses using offspring from the first cross. When she crossed two of the crested birds, all 20 of the offspring were crested. When she crossed a non-crested bird with a crested bird, 7 offspring were non-crested and 6 were crested. Which allele is dominant?299Has a video solution.
Textbook QuestionIn a process known as 'coral bleaching,' high water temperatures cause corals to expel the dinoflagellates that normally reside within their cells. How might coral bleaching affect coral reefs?171Has a video solution.
