click below
click below
Normal Size Small Size show me how
madeline freeman Q4
mmf Q4 animals chordates- amphibians
| Question | Answer |
|---|---|
| are they vertebrates or invertebrates? | vertebrates |
| cold-blooded or warm-blooded? | cold-blooded |
| how long ago were they on earth? | 360 million years ago |
| what did they evolve from? | certain fish |
| what does amphibian mean? | double life |
| what metamorphosis do they go through and what are the stages? | complete metmorphosis, egg hatches to tadpole that lives in water, swims, and breathes w/ gills. grows front legs and starts forming lungs it the pollywog stage. the polliwog loses it's tail, grows back legs, fully breathes w/ lungs, and lives on land |
| where do the live? | first in water then on land, that's why they have a "double life" |
| how do they breathe? | when young they breathe with gills. then as adults they breathe through their skin and with lungs |
| why must they always be moist? | because they breathe through their skin |
| what are some examples of amphibians? | frogs, toads, salamenders |
| how many legs and what are their toes like? | four legs, toes without claws. |
| what do they do in the winter? | they hibernate |
| when they hibernate in the summer, what is that called? | aestivation |
| muscular/skeletal? | inner skeleton w/ backbone. webbed feet no claws. muscles |
| digestion? | takes food through mouth. long sticky tongue that whips out and grabs prey. has system w/ stomach, intestines, etc. |
| nervous? | brain w/ nervous system. two eyes w/ an extra eyelid t protect eye on land. |
| circulation? | cold-blooded, body temp. same as surroundings. has two loop system, one from lungs to heart and one heart to body. |
| respiration? | takes oxygen from skin. tadpole uses gills, adult uses lungs. |
| symmetry? | bilateral |
| reproduction? | external fertilization w/ male and female -- sexually. jelly like eggs laid in water |
| why do frogs and toads constantly pulsate their throat? | to pump air into lungs |
| why do they croak? | to find/get mate |
| what do they have in their skin? | many glands |