Animal Diversity- ch. 27 BSC 2011

Most animals exhibit the following structures or functions EXCEPT

• Nervous and muscle tissues

• Unique types of intercellular junctions such as tight junctions

• Autotrophic nutrition

• Sexual reproduction

• Multicellularity

What is the correct sequence of the following four events during animal development?

(1) gastrulation (2) metamorphosis (3) fertilization (4) cleavage

• 4,3,2,1

• 4,3,1,2

• 3,2,4,1

• 3,4,1,2

The number of legs an insect has, or the number of joints in a digit and location of limbs are influenced by ___________ genes

• Haploid

• Introns within

• Heterotic

• Hox

What should animals as diverse as corals and monkeys all have in common?

• A body cavity between wall and digestive system

• Number of embryonic tissue layers

• Type of body symmetry

• Presence of Hox genes

Almost all of the major animal body plans seen today appeared in the fossil record over 500 mya at the beginning of the

• Cambrian period

• Jurassic period

• Permian period

• Carboniferous period

The major branches of Eumetazoa are the Radiata and Bilateria. These names refer to what characteristic of these animals?

• Size

• Body symmetry

• Embryonic cleavage

• Types of appendages

Cephalization is generally associated with all of the following EXCEPT

• Bilateral symmetry

• Concentration of sensory structures at the anterior end

• A brain

• A longitudinal nerve cord

• A sessile existence

You are trying to identify an organism. It is an animal, but it does not have nerve or muscle tissue. It is neither diploblastic or triploblastic. It is probably a

• Flatworm

• comb jelly

• Sea star

• Sponge

• Nematode

Which of the following functions is an advantage of having a coelom?

• Internal organs are cushioned and protected from injury.

• Organs can grow and move independently of the outer body wall

• The cavity does NOT allow for the diffusion of gases.

• Some of the choices are correct.

• All of the choices are correct.

The type of metamorphosis where the eggs hatch and the young resemble the adults is

• Incomplete

• complete

• asymptomatic

• zygosymptomatic

• homeobox