Animal Body Plan

If an animal has a head and a tail, it has _____ symmetry.

• It does not have symmetry.

• bilateral

• radial

• super duper cool

Which type of symmetry does this organism have?

• Asymmetrical

• Radial Symmetry

• Bilateral Symmetry

A(n) ______ is a group of similar cells that performs a specific function.

• organ

• cell

• tissue

• organ system

Which is an example of an organ?

• bone

• skeleton

• blood

• nervous tissue

Which is an example of an organ system?

• Respiratory System

• Heart

• Blood

• Jellyfish

A sea star has radial symmetry because ...

• many imaginary lines can be drawn through a central point

• one line of symmetry can be drawn to divide it into halves that are mirror images.

The animal's digestive tract forms from the _______.

• endoderm

• mesoderm

• ecotoderm

• protostome

Layers of cells on the outer surface of the gastrula

• ectoderm

• endoderm

• mesoderm

6- Coelom is the body cavity formed from the layer:

• (i) Ectoderm

• (ii) Mesoderm

• (iii) Endoderm

• (iv) Mesoglea

Acoelomates are characterized by

• the absence of a brain

• the absence of a mesoderm

• deuterostome development

• a coelom that's not lined with a mesoderm

• a solid body with a cavity surrounding internal organs.