Flashcards in Diversity of Animals II/Ecology Deck (210)
What class was the first vertebrates to move onto land?
Give three (3) examples of organisms that were already on land before the amphibians
What are four (4) adaptions necessary for vertebrates to become terrestrial?
2. Stronger limbs
3. Thermoregulatory mechanism
4. Reproductive strategies that don't involve water
Why are stronger limbs required to be terrestrial?
Air is 1,000 times less buoyant than water so strong limbs are necessary to prevent being crushed under own weight.
What causes a large diversity of terrestrial organisms?
There are lots of habitats to move into and adapt to.
What does "amphibia" literally translate to?
Bia: (Bio) Lives
What are the two (2) stages of a frog?
What is the diet of a tadpole?
How does the tadpole move around?
Tail for swimming
Where does the tadpole live?
How does the adult frog move?
What does the adult frog eat?
How does the adult frog breathe?
Describe "grasping" by a frog
The male grasps the female stimulating her to release eggs.
How are frog eggs fertilized?
The male releases sperm into the water where the eggs are fertilized.
Why must frog eggs be fertilized in water?
They have a jellycoat without a shell and would desiccate in air.
Describe the skeleton of amphibians
How many limbs to amphibians have?
Tetrapods (4 limbs)
Describe the skin of amphibians
Moist skin with mucous glands that are often toxic.
Describe three (3) ways that amphibians undergo gas exchange
Describe the number of chambers in an amphibian heart
1. 2 atria
2. 1 ventricle
What does ectothermal mean?
Body temperature is regulated by the environment
How do amphibians regulate their body temperature?
How can some amphibians hear?
External eardrums for sound carried through the air.
What are four (4) possible causes of the crashes in amphibian populations?
1. Habitat alterations
2. Global warming
3. Acid rain
4. Fungal (chytridia) infection
What are three orders of the class Amphibia?
1. Caudata (aka Urodela)
3. Gymnophiona (aka Apoda)
What is the meaning of the word Caudata?
What is the meaning of the word Anura?
What is the meaning of the word Apoda?