31. Invertebrates

Sponges feed by __________.

Sponges lack __________.

Some digestion in sponges takes place in the __________.

Which of the following is/are characteristic of sponges?

Which of the following features is characteristic of the poriferan (sponge) body plan or life history?

Some cnidarians go through both a motile stage and a sessile (attached) stage during their life cycle. The attached stage is called a(n) __________.

Through what means do coral animals capture their food?

__________ are members of the phylum __________ and feed by __________.

The choanocyte of a sponge and the nematocyst of a cnidarian both function in __________.

Which of the following is true about the phylum Cnidaria?

Which 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 system

Jon 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.

In 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?