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Science · Drill 95

Science practice 95

5 questions ~9 min recommended
⏱ 00:00
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Echinoderm Asteroid (starfish) Ophiurond (battle Mar) Holothurian (sea cucumber) Crinoid (sea lilies) Table 1 Locomotion method "walks" using spines and tube feet thrashes and rows its ams and expands body; some use of tube feet swims by raising arms up and down Fooding method xudes seduce out co capture prea stomach suspension feeder, catches small organisms with its arms swallows mud and sand: digests organic material ejects remainder suspension feeder: fans arms out to catch passing plankton

Their vegetation is sparser than12345

PASSAGE III

Echinoderms are defined as any of a variety of invertebrate marine animals characterized by a hard, spiny covering or skin. They have attracted much attention due to their extensive fossil record, ecological importance, and bizarre body forms. Most echinoderms are extinct, but many living representatives still exist. All living echinoderms have an internal skeleton and a central cavity, but the outward appearance can vary significantly. For example, starfish and brittle stars have arms that extend from a central disk; sea lilies have a central stalk, or stem, and resemble flowers; sea cucumbers are wormlike and tend to burrow.

The ways in which echinoderms move and feed are as diverse as their body forms. Table 1 lists certain echinoderms and their methods of locomotion (movement) and feeding.

Table 2 includes examples of echinoderm habitats around the world.

1. The echinoderm shown below is most likely a:

2. According to Table 1 and Table 2, crinoids can be found feeding on plankton:

3. Based on the data provided in the passage, sea cucumbers most likely burrow in order to:

4. Suppose scientists discover a new echinoderm that uses its tube feet to move across the deep-sea floor as it hunts for prey. This newly discovered echinoderm can most likely be classified as a(n):

5. A student hypothesized that large populations of sea cucumbers could greatly alter the physical and chemical composition of the sea floor. Is this hypothesis supported by the data in the passage?

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