Living amphibians include ____
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Living amphibians include ______.
A. all of these
B. frogs
C. toads
D. newts
E. salamanders
2. ______ fishes are the sharks, the rays and the skates.
| A. |
Cartilaginous |
|
| B. |
Agnathous or jawless |
|
| C. |
Bony |
|
| D. |
Freshwater |
3. Living amphibians include ______.
| A. |
all of these |
|
| B. |
frogs |
|
| C. |
toads |
|
| D. |
newts |
|
| E. |
salamanders |
Answer:
Ans. Amphibians are tetrapod vertebrates of theclass Amphibia and all are ectothermic. Modernamphibians are all Lissamphibia. They live in various habitats,most of them are arboreal, terrestrial, fossorial, or freshwateraquatic ecosystems. Amphibian species normally start out in thewater as larvae, but some species develop behavioural adjustmentsto circumvent this. The three modern orders of amphibians are Apoda(the caecilians), Anura (the frogs and toads), and Urodela (thesalamanders). A newt belongs to Pleurodelinae subfamily ofsalamander. The terrestrial youth period is known as the Eft. Incontrast to other Salamandridae families, newts are semi-aquaticand alternate between aquatic and terrestrial habitats. Not allaquatic salamanders are newt.
So, the answer is:
A. all of these
Ans 2. The Chondrichthyes class includes rays, skates, andsharks, all (Greek, chondro means cartilage, ichthos is meaningfish). Chondrichthyes characteristics include cartilage skeleton,jaws, paired fins, and a pair of nostrils. Elasmobranchii Subclassconsists of sharks, rays and skates.
So, the answer is:
A. Cartilaginous
Ans 3. Amphibians are tetrapod vertebrates ofthe class Amphibia and all are ectothermic. Modernamphibians are all Lissamphibia. They live in various habitats,most of them are arboreal, terrestrial, fossorial, or freshwateraquatic ecosystems. Amphibian species normally start out in thewater as larvae, but some species develop behavioural adjustmentsto circumvent this. The three modern orders of amphibians are Apoda(the caecilians), Anura (the frogs and toads), and Urodela (thesalamanders). A newt belongs to Pleurodelinae subfamily ofsalamander. The terrestrial youth period is known as the Eft. Incontrast to other Salamandridae families, newts are semi-aquaticand alternate between aquatic and terrestrial habitats. Not allaquatic salamanders are newt.
So, the answer is:
A. all of these
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