Each vertebrate subgroup is classified based on its common characteristics. Choose the vertebrate subgroup that is poikilothermic * 2 points

(a) Mammal

(b) Fish

(c) Reptile

(d) Bird

(e) Amphibian

What is the importance of a system of classification of living organisms?

option a is correct i.e.

explanation:

in context to the membrane of nerve impulse, the outer membrane of neuron is semi permeable that is only sodium ions can pass through the membrane i.e. smaller ions can pass through the membrane while larger ions cannot pass through it.

i'm thinking (a) to keep sand in place; ////////////

explanation: a sand fence or sandbreak, like a snow fence, is used to force windblown, drifting sand to accumulate in a desired place. sand fences are employed to control erosion, sand dune stabilization, keep sand off roadways, and to recruit new material in desert areas.

the correct answer is 2 and 4