Name for animals that spend most, if not all, of their lives attached to a substrate.
What is sessile?
200
An important concept of science that states an idea has to have the possibility of being shown to be false using a scientific method and empirical evidence in order to be considered scientific.
What is falsifiability?
200
Structures found in the mesophyll between inner and outer layers that make up the sponge's support system.
What are spicules?
200
Common characteristic of all cnidarians.
What are stinging cells or cnidocytes?
200
The layer between the epidermis and gastrodermis in cnidarians.
What is the mesoglea?
200
The term for animals with just two cell layers.
What is diploblastic?
300
Moral, ethical, or metaphysical questions.
What are questions science cannot address?
300
Cells that line the interior of the sponge's body and use flagella to draw water through the pores.
What are choanocytes?
300
The two forms that cnidarians take.
What are polyp and medusa?
300
The coiled, harpoon-like stinger inside a cnidocyte that shoots out to paralyze prey with toxins.
What is the nematocyst?
400
Scientific knowledge is always subject to revision when new info is presented and accumulated evidence provides support or validation never this ________.
What is proof?
400
Cells that aid in reproduction and nutrient transport and are able to move throughout a sponges inner layer.
What are amoebocytes?
400
The asexual process, common in cnidarians, that leads to the outgrowth of a new organism from the parent organism.
What is budding?
400
Global phenomena that has potentially lead to the warming of ocean waters and the decline of many coral reefs.
What is climate change?
500
The internal buds of sponges that allow them to reproduce asexually especially when experiencing harsh environmental conditions.
What are gemmules?
500
The state of many sponges that allows them to produce both sperm and eggs.
What is hermaphroditic?
500
The two cnidarian "inventions" that allow them to actively move.