Vocabulary
cold-blooded animals who rely on the environment to control their body temperature.
ectotherms
Bony fish
If you are a chordate, what do you have?
a spinal cord, with or without a backbone OR you could say at some point in your life you had a notochord
Name three amphibians.
Frogs, toads, salamanders, newts, caecilians.
True or False: amphibians lay eggs
True
warm-blooded creatures who contorl their own body temperature by internal mechanisms.
endotherms
This class of fish, which includes sharks, rays, and skates, have skeletons made of catilage
cartilaginous fish
name the only group of chordates that does not have bones or a spine
lancelet
Describe salamander or frog metamophosis.
Egg hatches in water, an aquatic larva like a tadpole or gilled/limbless salamander hatches. Legs and limbs sprout. In frogs, tails drop off. In salamanders gills may shrink if the salamander is going to live on land. The frog or salamander is now an adult once it had four limbs, no tail (frogs) or smaller/no gills (salamanders) and can live on land.
Describe amphibian eggs
No shells, soft and jelly like. Laid in water.
lampreys and hagfish used to be two classes of fish but are now one, known as what class of fish?
Jawless fish
Name the SIX groups of chordates
lancelets, fish, amphibians, reptiles, birds, and mammals
Why do amphibians need moist skin?
To help them breathe, as many breathe through their skin.
What are baby frogs called once they hatch and live in water?
tadpoles
Absorbs dissolved water from oxygen
gills
Many fish have a _________________ that inflates and deflates to keep that at just the right level in the water.
swim bladder
What is an endoskeleton and what roles does it play?
It is an internal skeleton and it's role is to give us structure and protect internal organs.
Name and describe the three classes of amphibians
Toads and Frogs: The tailess amphibians
Salamanders and Newts: The tailed amphibians.
Caecilians: The legless amphibians
What is the difference between a notochord and a vertebrate?
A notochord has a neural chord at some point in its life, while a vertebrate has a neural cord but also has bones, specificially a backbone.
cartilage
Name an example of a bony fish, a jawless fish, and a cartilaginous fish
Bony: trout, salmon, flounder, tuna, marlin (and more)
Cartilaginous: sharks, skates, or rays
Jawless: Lamprey or hagfish
Which chordate is able to spend its life entirely in water, and which chordate is able to live half its life in water and half on land?
1. Fish, 2. Amphibians
What does amphibian mean in Greek. Why is this a good name for amphibians?
In Greek, it means double life. This is a great term for amphibians because they live half their life in water and half on land.
T or F: Fish are ectotherms
True