Evolution isn't a steady process. When the environment changes, the organisms have to adapt quickly or perish. A theory known as punctuated equilibrium accounts for this. Any changes in then environment brought on by natural or artificial changes will cause animals to evolve to those changes. It may be that they just have to migrate where the climate is more suitable. When you look at geologic sequences, you can often see the different environments as the climate changed and a new suite of animals and plants took over.
<span>It is fantasy to claim that the "old" environment was stable before humans came along unless you live in the tropics. There was a mile of ice over NYC and Chicago 15 thousand years ago. </span>
<span>Geologic changes can affect evolution by creating population splits which allows for speciation. For example, the thrusting up of a mountain range may cause one population to split into two. The separate populations may then evolve on their own sometimes into new niches. One population may stay relatively similar and the other may change dramatically.</span>
Answer:
Biological preparedness
Explanation:
Human beings generally have an aversion to bitter and sour foods. Some researchers suggest that this is because foods that are inedible or even poisonous are often bitter or sour. The tendency of human beings to find these potentially harmful foods repulsive is an example of biological preparedness.
According to research, foods that are inedible or poisonous are often bitter or sour there by causing the dislike of human beings towards bitter and sour foods.. This process is called biological preparedness
Answer:
In the distribution of scarce resources, caste systems rely on ascribed statuses and class systems rely on achieved statuses. (letter D)
Explanation:
Class systems present a social hierarchy that results from a person's achievements, that is, through their effort. For instance, you can be born poor but end up wealthy by gaining knowledge that will lead you to better job opportunities. Therefore, this type of system has social mobility. It also allows for interactions between classes.
On the other hand, a caste systems is more rigid. Its statuses depend on what you already possess at birth, on what is ascribed to you. That is, your gender, race, wealth, etc. are all determined by your family, by what you are born with. This type of system does not allow for much mobility.
