A sponge does not have neurons.

Vertebrates account for >95% of all animal species today.

Animals are autotrophs.

Male gametes are stem cells.

Body cavities aid in movement.

Mitotic division produces two identical offspring.

Some animals spend their entire lives attached to a surface, like a barnacle.

All animals have tissue and germ layers.

The first animals likely arose from the sea and evolved from _____________.

_____________ is the evolutionary adaptation of a cell for a particular function.

Body structure includes all of the following except _______________.

As cleavage progresses, the number of cells rapidly _____________.

The blastopore that develops into an anus and the second opening forms a mouth is a ___________.

The three germ layers of the gastrula include all of the following except ___________.

Vertebrates have a __________ circulatory system.

Invertebrates may have one of the following body supports except ___________.

In the simplest aquatic invertebrates, gas exchange occurs _____________.

a body arrangement in which parts lie on opposite sides of an axis are identical

a firm, flexible rod of tissue located in dorsal part of body

outer covering of an animal

cells become specialized and differ from one another 

a hollow tube above the notochord

small out pockets of the anterior digestive tract

consists of muscle tissue and lies behind posterior opening of the digestive tract

body composed of a series of repeating similar units

multicellular heterotrophic organisms that lack cell walls

concentration of sensory/brain structures in anterior end of animal

organic molecules (carbs, lipids, proteins) extracted from material or cells ingested

animals take in organic material or food, usually living things

an organism that produces both male and female gametes

animals without a backbone

animals with a backbone

All of the following are a class of vertebrates except ___________.

All of the following are a class of vertebrates except ___________.

If an invertebrate undergoes a larval stage, it would be _________ development.

If an invertebrate does not have a larval stage, it would be _________ development.

What are the four characteristics comprising all animals?

What are the four categories that taxonomists use to classify animals into phyla?

What four characteristics doe all chordates have during development?

What are the four body planes used to determine what side of the body is being referred to?

Dorsal refers to the _____________

Ventral refers to the _____________

Posterior references _____________

Posterior references _____________