Answer:
Changes in the environment may leave individuals less well adapted to compete successfully for resources such as food, water and mates. Sometimes an entire species may become unable to compete successfully and reproduce. These problems can lead to extinction.
Answer:
Dietary fiber refers to a group of substances in plant foods which cannot be completely broken down by human digestive enzymes. This includes waxes, lignin and polysaccharides such as cellulose and pectin. Originally it was thought that dietary fiber was completely indigestible and did not provide any energy.
Explanation:
<h2>Answer:</h2>
B. the importance and limits of political power
<h2>Explanation:</h2>
Niccolo Machiavelli was an eminent Italian author and statesman who in his best-known work, The Prince, described the means by which government may gain and maintain its power. He believed in gain of power by whatever means and to maintain it for long period of time. He said that gaining power is the only way to live with honor because the world is a place for the fittest people and not the weak ones. This famous theory is known as Realism in Political Science.
The simultaneous arrival of graded depolarization and a graded hyperpolarization of equal but opposite magnitude at a particular location on the dendritic membrane is likely to cancel the effects of each other and no change will occur in the membrane potential.
Explanation:
Graded potentials lead to temporary minor changes in the membrane potential associated with neuron’s dendrites. The amount of change caused depends upon the size and duration of the stimulus. These can be depolarizing or hyperpolarizing.
Graded depolarization occurs due to the entry of sodium or calcium ions; whereas, graded hyperpolarization occurs due to exit of potassium ions or entry of chloride ions.
When equal but opposite magnitude of graded depolarization and hyperpolarization occurs at a particular dendride of a neuron, the positive and negative charges get neutralized causing little or no effect on the total membrane potential.
