Chapter 24.3, Problem 1NV

Summary Introduction

To define:

The term filter feeders, sessile, cnidocyte, nematocyst, gastrovascular cavity, nerve net, polyp, and medusa.

Explanation of Solution

Filter feedersrepresents an animal, which feed on the small particles suspended in the water by engulfing water and filtering out all the undesirable particle.

Sessile organism is an immobile organism that is attached from one end to a hard surface, but does not have a stalk and peduncle.

Cnidocyte is a cell present in cnidarians that have a secretory organelle cnida and produces some chemicals against the predators.

Nematocyst are special capsule-like cells produced by cnidarians which contains venom and help in protection from the prey.

Gastrovascular cavity is an organ that perform the function of digestion and absorption.

Nerve net is simple arrangement of sensory structures in primitive and simpler organism that forms a net like structure.

Polyp is defined as sessile life form of Cnidarians and columnar hollow shape structure.

Medusa is a life form of cnidarians with umbrella shaped body and multiple hanging tentacles.