Answer:
Importance of polar bears. Polar bears are at the top of the food chain and have an important role in the overall health of the marine environment. Over thousands of years, polar bears have also been an important part of the cultures and economies of Arctic peoples.
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Answer:
20c is ponds cooler that 20 c hotter so its has more oxygen
The answer is chromosomes
The answer is: generation of graded potential. Graded potentials are membrane potential of varying sizes in mV that are a result of opening up of ionotropic channels. When the graded potentials net value add up and reach the threshold potential, then an impulse is generated in the post synaptic neuron.