Cnidarians And Ctenophores Flashcards
Cnidarians are effective predators. (true or false).
True
The nematocysts requires only small stimulus to fire and injecting prey with toxin. (true or false).
True
What type of germ layer do cnidarians and Ctenophora have?
Diploblastic
Weapons of cnidarians are called…….
Nematocysts
In adult cnidarians the epidermis is developed from……..
The ectoderm
In adult cnidarians the gastrodermis is developed from……..
The endoderm
Currently neither sponges or placozoans are considered as…….
Diploblastic
Over 9000 species are in the phylum Cnidaria. (true or false).
True
A specialized cells in cnidarians……
Cnidocytes
Cnidocytes contain specialized organelles called……
Cnidae
The most common type of cbidae is……..
Nematocysts
Nematocysts are only produced and used by cnidarians, but other animal such as (mulascas, Ctenophora and flat worms) eat cnidarians and can incorporate nematocysts to their use and needs. (true or false).
True
Most cnidarians are………
Marine environments
Some cnidarians are………..
Fresh water
Non of the cnidarians are………..
Terrestrial
There is a…….. Symbiotic relationship between algae and coral reefs
Mutualistic
The four classes of cnidaria are…….
Syphozoa - cubozoa - hydrozoa - anthozoa
A fifth class is
Staurozoa
A sixth class of cnidaria has been proposed and molecular data now identifies, and its highly modified parasitic forms is……..
Myxozoa
Dimorophism and polymorphism in cnidarians, all are one of two morphological types, and they exhibit dimorophism. (true or false).
True
……….. Is adapted to a sedentary life
The polyp (hydroid)
Is adapted to a motile life
Medusa (jellyfish)
Most polyps have……
Tubular body
In most polyps the mouth leads to…
into a blind gastrovascular cavity
In most polyps the mouth leads to…
into a blind gastrovascular cavity
