Invertebrates are missing these bones... hence their name.
What are vertebrae or backbones.
100
Sponges display this type of symmetry, or lack there of.
What is assymmetry.
100
Cnidarians exhibit this type of symmetry, like that of a pizza.
What is radial symmetry.
100
This 8-legged cousin of the squid is known for its ability to solve complex problems and predict winners of the world-cup in soccer.
What is the octopus.
100
Part of the body that steers a squid to move in a specific direction.
What is the fin.
200
All invertebrates are this term, which means consisting of more than one cell.
What is multicellular.
200
Sponges are part of this phylum, which describes their "hole" appearance.
What is Porifera (pore-bearing).
200
Cnidarians naturally exist in two forms. One is the medusa form such as a jellyfish. The other is this form, such as coral or an anemone.
What is a polyp.
200
Hey, pass the hors d'oeuvres. Calamari is generally served from two sections of the squid. If you aren't eating a tentacle, you are most likely eating a ring from this section of the body.
What is the mantle.
200
A defense mechanism that squid use to escape from predators. It's right next to the pen.
What is ink.
300
All invertebrates except the sponge contain these, a word that describes a group of cells that work together.
What are tissues.
300
Sponges spend their entire lives stuck in one location. This term describes their sedentary lifestyle.
What is sessile.
300
A unique group of cnidarians are these hydrozoans that form a colony of polyps that can move around and work together to eat.
What is the Portuguese Man-O-War
300
Mollusks and most other animals exhibit this type of symmetry. It is best displayed by drawing a line directly down the center of the body, even your own.
What is bilateral symmetry.
300
A soft protein skeleton that sponges have developed to give them flexibility, and thus they were named...
What is spongin.
400
All invertebrates are this term, meaning that they must eat other organisms to gain energy.
What is heterotrophic/consumers.
400
Sponges are these types of feeders, meaning that they actively suck microorganisms out of the water.
What are filter feeders.
400
Coral reefs have a hard outer shell that is often left behind once they die. The rock-like skeleton is made out of this material.
What is calcium carbonate.
400
When a squid wants to get away quickly they will take in water and shoot it out through this opening. As the water goes one way, the squid goes another.
What is the siphon.
400
Group of spineless organisms that evolved following the small unicellular organisms such as plankton.
What are invertebrates.
500
All invertebrates fall into this general domain. Its name means that the cells of these organisms contain a true nucleus.
What is eukaryota or eukaryotic.
500
These cells contain flagella that move water through the sponge. Without their constant movements the sponge would never eat.
What are choanocytes or collar cells.
500
Coral reefs form a symbiotic relationship with these phytoplankton that provide them energy from the sun. In return, the plankton are protected from other organisms.
What are zooxanthellae.
500
Squid, octopi, and cuttlefish have all developed specialized receptors on their skin that allow them to change colors. What are these senses called?
What are chromatophores.
500
It started with a net in the cnidarian, but the squid evolved this structure. We often study them to learn about how our own works.