Lower animals & Invertebrates

26. What is the phylum of animals that includes starfish and sea urchins?

a) Porifera

b) Mollusca

c) Arthropoda

d) Echinodermata

27. What is the body plan of a sponge?

a) Bilateral symmetry

b) Radial symmetry

c) Asymmetrical

d) Spherical

28. How do earthworms move?

a) By swimming

b) By flying

c) By crawling

d) By hopping

29. Which of the following is a characteristic of nematodes?

a) They have jointed appendages

b) They have bilateral symmetry

c) They have stinging cells

d) They respire through spiracles

30. How many legs do centipedes typically have?

a) 4

b) 6

c) 8

d) 10