While walking to the kitchen in the middle of the night, jamal tripped over an object that he could not see in the dark. which part of the cns sent a signal to prevent jamal from falling?
a. cerebrum
b.hippocampus
c. cerebellum
d. brain stem

The answer to the question above is letter c. cerebellum

While walking to the kitchen in the middle of the night, Jamal tripped over an object that he could not see in the dark.The cerebellum sent asignal to help prevent Jamal from falling.  The cerebellum controls body balance, movement and coordination.

The answer to the question above is letter c. cerebellum

Explanation:

Natural selection is a way of selecting certain organisms naturally that consists of specific features making them capable of better adapting and surviving in a particular environment.

Further Explanation:

In 1859, Charles Darwin introduced the theory of natural selection to provide an explanation of adaptation and speciation. According to the theory, the useful variations or mutations in the genome of an individual would help him/her to better adjust in the surrounding environment and therefore, such variations are selected as such. This results in better survival capacity of an individual and also leads to passing on the variations to future generations through reproduction. The environmental conditions keep on changing with time. In order to survive in the changing environment, the organism’s genome keeps on undergoing mutations so as to produce useful traits to be able to cope in such surroundings. The traits which in turn help the organism to adapt the environmental conditions are selected naturally compared to the traits of other organisms that are less useful. These variations are called advantageous variations that allow an individual to remain and reproduce better so as to increase its number.

The organisms differ among each other in a population due to random mutations that take place within their genome. Sometimes these mutations are passed on to their offspring as they are important for the survival of the progeny. As the environment changes, an individual also undergoes changes in order to adjust itself with the changing conditions. For example, in an extremely cold environment, certain organisms bring about changes in their genome and with time have produce fur so as to protect themselves from the cold. There are certain other organisms who could not adapt in such a colder environment and therefore, became extinct. Thus, natural selection is defined as a process wherein useful adaptation is favoured and the fittest organism depending on the environmental conditions survives and reproduces.

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Answer Details:

Grade: Secondary School

Chapter: Theory of Natural Selection

Subject: Biology

Keywords:

Natural selection, traits, adaptation, variation, mutations, reproduction, environmental conditions, random mutations, genome.