Cnidarians and Hydras Section Flashcards
(20 cards)
What is a hydraskeleton? Give a example
A body supported by water pressure; jellyfish
What is endothermic?
An organism that makes its own body heat through metabolism
What is the difference between learned behavior and instinct?
Instinct-is a reaction you are born with
Learned behavior- is a something you learn over time from your environment
What is viviparous?
When the baby is inside the moms belly with placenta connections exp.humans
What is invertebrate? What percentage are invertebrates?
No backbone; 97%
What is vertebrate? What percentage are vertebrates?
Have a backbone; 3%
What is the nervous system of cnidarians?
Nerve net
What are the 3 types of symmetry and what are examples of each?
Radial-Hydra
Asymmetrical-sponge
Bilateral-human
What is a endoskeleton? and a example of it
Bone structure on inside of the animal Exp. Horse, dog, human
What is a hermphrodite?
Organism that has both sex organisms, testes, and ovaries
What is oviparous?
When a baby develops in a egg, example bird
What is ectothermic?
When it regulates its temperature based on the environment
What is oviviparous?
When a egg develops inside of the mom, there is no placental connection, the mom is used as a incubator
What are the germ layers and what do they become?
Endoderm-digestive tract
Mesoderm-muscular and circulatory
Ectoderm-outer layers
What is a exoskeleton? and a example?
Skeleton on the outside and is plated; lobster or crab
What are 6 characteristics of animals?
Heterotrophic, eukaryotic, multicellular, some form of structural support, a body plan, all must eat, circulation, some form of reproduction
What are the 2 forms of cnidarians?
Medusa and polyp
What are the specialized cells of cnidarians called?
Cnidocytes
What are the characteristics of poriferea?
1 germ layer, no nervous system, no digestive, motile for short period of time then sessile as adults, reproduce asexually by budding and asexually by external reproduction, invertebrate
What are the characteristics of cniderians?
Incomplete digestion, polyps and Medusa, debatable germ layer 2, catch food with tentacles and nematocyts then digest it expelled, reproduces asexually through budding and fragmentation
