4 of 20Which statement best describes how an earthworm moves?It forms pseudopods that ooze forward or backward.It contracts longitudinal muscles, which puts pressure on the hydrostatic skeleton and causes it to extend.It stretches its longitudinal muscles and pushes its fluid-filled body cavity forward.It alternates contractions of longitudinal and circular muscles.It uses the coordinated beating of many cilia.

It forms pseudopods that ooze forward or backward. It contracts longitudinal muscles, which puts pressure on the hydrostatic skeleton ane It stretches its longitudinal muscles and pushes its fluid-filled body cavity forward. It alternates contractions of longitudinal and circular muscles. It uses the coordinated beating of many cilia.

It forms pseudopods that ooze forward or backward. It contracts longitudinal muscles, which puts pressure on the hydrostatic skeleton ane It stretches its longitudinal muscles and pushes its fluid-filled body cavity forward. It alternates contractions of longitudinal and circular muscles. It uses the coordinated beating of many cilia.

Biology 2e

2nd Edition

ISBN:9781947172517

Author:Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark

Chapter28: Invertebrates

Section: Chapter Questions

Problem 9RQ: While collecting specimens, a marine biologist finds a sessile Cnidarian. The medusas that bud from...

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Most sponge body plans are slight variations on a simple tube-within-a-tube design. Which of the following is a key limitation of sponge body plans? Sponges lack the specialized cell types needed to produce more complex body plans The reliance on osmosis/diffusion requires a design that maximizes the surface area to volume ratio of the sponge Choanocytes must be protected from the hostile exterior environment Spongin cannot support heavy bodies.
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Figure 28.21 Which of the following statements about the anatomy of a mollusk is false? Mollusks have a radula for grinding food. A digestive gland is connected to the stomach. The tissue beneath the shell is called the mantle. The digestive system includes a gizzard, a stomach, a digestive gland, and the intestine.
Figure 27.6 Which of the following statements is false? Eumetazoans have specialized tissues and parazoans don’t. Lophotrochozoa and Ecdysozoa are both Bilataria. Acoela and Cnidaria both possess radial symmetry. Arthropods are more closely related to nematodes than they are to annelids.
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