Animals: Invertebrates Chapter 11

Hard exoskeleton, segmented bodies, pairs of jointed appendages are characteristics of ____.

• annelids

• cnidarians

• arthropods

• mollusks

Structures and behaviors that allow animals to perform their functions are called ___.

• homeostasis

• radials

• organs

• adaptations

Jellyfish, hydras, sea anemonies, and corals are examples of _____.

• annelids

• cnidarians

• arthropods

• mollusks

Round, segmented worms that have bilateral symmetry belong to the phylum ____.

• arthropods

• annelids

• sponges

• cnidarians

A body plan that has no symmetry is called _______.

• asymmetrical

• radial symmetry

• bilateral symmetry

• egosymmetry

A branching diagram based on shared traits that shows the relationship between species is called a(n) ____.

• dichotomous key

• family tree

• cladogram

• homeostasis

Aquatic organisms that lack true tissues and organs and do not move in adulthood belong to this phylum.

• mollusks

• arthropods

• sponges

• annelids

Animals with radial symmetry, a digestive cavity and tentacles with stinging cells belong to the phylum of ____.

• cnidarians

• annelids

• echinoderms

• arthropods

An animal with no backbone is known as a(n) ___.

• vertebrate

• chordate

• invertebrate

• cladogram

Earthworms, leeches, and marine worms are examples of _____.

• cnidarians

• mollusks

• adaptations

• annelids