DC- Zoology Ch7 Review

Cnidarians like jellyfish and sea anemones possess

A fluid filled body cavity

This type of group includes a most recent common ancestor and ALL of its descendants

The thin mesodermal lining in the coelum of triploblastic animals

The end opposite the mouth region of a radially symmetrical animal

The back of an animal; usually the upper surface

On a cladogram, this does not include the most recent ancestor of all members of the group.

Triploblastic organisms that do not possess a body cavity

In deuterostomes the blastopore becomes

The embryos of all animals that possess tissue layers have an outer layer of cells called

Triploblastic organism that possess a body cavity that is completely lined in mesodermal tissue

Arrangement of body parts WITHOUT a central axis or point

In coelumates, sheets of mesodermal tissue that help to suspend visceral structures are called

The domain composed of prokaryotic organisms that live in almost every enviroment

A single plane passing through the longitudinal axis produces a right and left mirror image.

In embryological development the blastopore becomes the mouth

The embryos of all animals that possess tissue layers have an inner layer of cells called

The study of the diversity of organisms and their evolutionary relationships to each other.

What is the BROADEST taxonomic level?

In triploblastic organisms the ____ is the tissue layer between the endoderm and ectoderm

Sponges in Pylum Proifera posses

On a cladogram, this includes some, BUT NOT ALL, descendants of a most recent common ancestor

Animals with three distinct tissue layers are

Triploblastic organisms with a body cavity that is NOT lined in mesodermal tissue

The head end

What is the taxonomic level between Class and Family

This describes how the parts of an animal may be arranged around a central point or axis

A sea anemone's mouth is located at the _________ end of its body

The mesoglea is a jelly-like region found in

The tail end

The belly of an animal; usually the lower surface

All organisms in this domain store their DNA inside of a nucleus

Any plane passing through the Oral-Aboral axis produces a mirror image

Jellyfish, corals, and sea anemones are arranged along the ______________ axis

The assignment of a specific name to each species

Animals that possess only two layers of tissues are said to be...

Both vertebrates and arthropods possess

Assumes that closely related organisms are more similar than to distantly related organisms

What taxonomic level is between Kingdom and Class

Structures or processes that are derived from a common ancestor

Taxonomy, the system of classifying organisms, began with the work of...

The domain composed of prokaryotes, many of which are able to survive in extreme environments

Many protists are composed of a single _____