Answer:
The correct answer is a. retinal disparity
Explanation:
Humans have two eyes that see the image at slightly different angles and for perception depth it is important to see the object from both the eyes. Retinal disparity is the way which helps in depth perception.
In this situation, the image seen by both the eyes at different angles is processed by the brain and after processing it is seen as a single image with the correct depth of the image. In many situations retinal disparity comes into play like diving.
Therefore if a person lacks an eye then retinal disparity is the visual cue that would be lacked by him.
<span>the activity that does NOT improve stability is: A. maintaining narrow base
A wide base support is easier to balance than a narrow base support .
Wide base support will provide you with lower center of gravity, (think how it is easier to stand with two legs compared with standing with one leg)</span>
1. change
The natural selection is a process that occurs as a direct consequence of the living conditions in the environment. When the environment starts to change though, the organisms that live in it face a big challenge. They either have to change, adapt to the new conditions, and thus survive, or if they are not able to do so, to die out. This is the biggest evolutionary pressure for the organisms, and while some come out as winners from it, many others die out .
2. variation
In order for the process of natural selection to occur, the population needs to have some genetic variation. The environment is the ultimate push factor, but if the population doesn't have genetic variation in it, than the species will die out. The genetic variation is very important as in that way the individuals choose who will they mate with, in accordance with their traits, so that only the advantageous traits can be passed on to the next generation, so that it can be more competitive in the environment.
3. traits
The natural selection is a very simple process. The individuals of a population, when choosing a mate, look for the individuals that exhibit traits that are advantageous for survival. Mating with individuals with traits that are advantageous guarantees that the offspring will inherit those traits, thus it will have higher chances to survive. The individuals that do not have advantageous traits though will be avoided as mating partners, and that would rapidly lead to their decline and elimination from the gene pool, as they will not have any offspring to continue their line.
I believe the answer is c
