<span>d. All of the above
These behaviors;
Spreading wings
Flattening feathers
panting
are all evolutionary process to maintain body temperature. Birds are warm-blooded animals. Also known as </span><span>homeotherms, which is defined as having the constant body temperature. This is a vital function for the survival of the specie.</span><span>
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The correct answer for this question would be the WHITE RHINOCEROS. The white rhinoceros weighs 5, 100 pounds or 2, 300 kilograms. In the list, the first mammal that is considered as the heaviest is the African elephant which weighs 24, 000 pounds or 11, 000 kilograms and followed by Asian elephant weighing 12, 100 pounds or 5, 500 kilograms. Hope this answer helps.
Skeletal muscle! (or striated muscle).
........... the membrane potential will become more POSITIVE.
A membrane become depolarize when sodium enters the neuron via chemically gated sodium channels, this means that, the membrane become more positive when sodium ions diffuse into the cells.<span />
