Exam 30: An Introduction to Animal Diversity

Which group of organisms display radial cleavage during development?

You are told that the digestive tract of the animal you are studying developed an anus before a mouth. You realize that you may be looking at a(n):

A true coelom develops within the ectoderm . ____________________

Which is a characteristic of ribbon worms and flatworms?

The ____ gives rise to muscles, bones, and the circulatory system.

A grasshopper belongs in the Ecdysozoa clade because of its ability to:

Draw a cladogram that for the following animals: sponges, cnidarians, flatworms, echinoderms, chordates, molluscs, annelids, nematodes, and arthropods. On your cladogram indicate the points where the following evolved: 1) true tissues, 2) bilateral symmetry, 3) three germ layers, 4) segmentation, 5) protostome development, and 6) deuterostome development.

Which of the following is NOT an adaptation needed for living on land?

Which pair of words is incorrectly matched?

A ____ plane divides the animal body into dorsal and ventral parts.

The main structural protein in the extracellular matrix and an important shared derived characteristic of animals is:

The epidermis of a nematode is derived from the:

The rapid appearance of animals in the fossil record occurred during the Ediacaran radiation. ____________________

In most protostomes, the blastopore develops into the:

Sponges have specialized cells, but those cells are not organized into:

Discuss the evolution of the coelom and pseudocoelom. What advantages do coelomate animals have over acoelomates?

How can radial symmetry be an advantage to slow-moving or sessile marine organisms?

Which of the following phyla is a deuterostome?

Which of the following explains why fewer animals live in freshwater than in the ocean?