Question 1

Which of the following animal phyla is characterized by having a water vascular system and tube feet for locomotion?

Accepted Answer

Echinodermata

Question 2

Which cell type in sponges is primarily responsible for generating water flow and capturing food particles?

Accepted Answer

Choanocyte

Question 3

Which of the following is a distinguishing feature of the phylum Nematoda?

Accepted Answer

Pseudocoelomate body cavity

Question 4

Which animal phyla belong to the clade Lophotrochozoa?

Accepted Answer

Platyhelminthes, Rotifera, Mollusca, Annelida

Question 5

Which of the following best describes the medusa form in Cnidarians?

Accepted Answer

A free-swimming, bell-shaped body plan

Question 6

Which class of molluscs is characterized by a shell divided into eight overlapping plates?

Accepted Answer

Polyplacophora

Question 7

Which of the following is a function of amoebocytes in sponges?

Accepted Answer

Transporting nutrients and producing spicules

Question 8

Which subphylum of arthropods includes insects?

Accepted Answer

Hexapoda

Question 9

Which of the following is a key characteristic of annelids?

Accepted Answer

Segmented body

Question 10

Which class of molluscs includes animals such as squids and octopuses?

Accepted Answer

Cephalopoda

Question 11

Which of the following is a function of the osculum in a sponge?

Accepted Answer

Expelling water from the sponge

Question 12

Which subphylum of arthropods is characterized by having two pairs of antennae and includes crabs and lobsters?

Accepted Answer

Crustacea

Question 13

Which of the following is a distinguishing feature of the phylum Chordata?

Accepted Answer

Presence of a notochord

Question 14

Which of the following animal phyla is in the clade Ecdysozoa?

Accepted Answer

Nematoda and Arthropoda

Question 15

Which class of molluscs is characterized by a single, usually spiraled shell and includes snails and slugs?

Accepted Answer

Gastropoda

Question 16

Which of the following best describes the polyp form in Cnidarians?

Accepted Answer

A sessile, cylindrical body plan

Question 17

Which subphylum of arthropods includes spiders, scorpions, and horseshoe crabs?

Accepted Answer

Cheliceriformes

Question 18

Which of the following is a function of spicules in sponges?

Accepted Answer

Providing structural support

Question 19

Which class of molluscs is characterized by two hinged shells and includes clams and oysters?

Accepted Answer

Bivalvia

Question 20

Which subphylum of arthropods includes centipedes and millipedes?

Accepted Answer

Myriapoda

Animal Phyla, Body Plans, and Classification Study Guide

Study Guide - Practice Questions