The correct macthing of the organs with their organ systems is as follows.
1. Digestive system - intestines.
2. Central nervous system - brain.
3. Respiratory system - tracheal system.
4. Excretory system - bladder.
Digestive system is made up of the alimentary canal consisting of the digestive organs and the glands. Among the digestive organs, the intestines play a major role in the process of digestion. The small intestine is the site of complete digestion which is associated with the pancreas and liver. The large intestine is involved the absorption of water from the digested food and remaining waste material is stored and thrown out of the body during defecation.
The central nervous system is made up of the brain and the spinal cord. The brain makes the largest part and the functional of the central nervous system. It controls most of the activities of the body. It is made up of three parts called the cerebrum, cerebellum and medualla oblongata and is protected by the skull.
The respiratory system is divided into the upper respiratory tract consisting of the nasal cavity, pharynx and larynx, and the lower respiratory tract consisting of the trachea, bronchi, bronchioles and the alveoli. The trachea or the wind pipe is a cylindrical tube infront of the oesophagus, supported by 16-20 C-shaped hyaline cartilage. It serves as a passage for air to move in and out of the lungs.
The excretory system is made up of a pair of kidneys, a pair of ureters, an urinary bladder and an urethra. The urine produced by the kidney flows through the ureters and is collected in the urinary bladder. A spinchter (a ring of muscle) guards the opening of the bladder into the urethra and relaxes only at the time of urination under the impulse from the brain.
It is significant because, this is where the stronger and more affinated genes are conceived, thus survive.
Genetiic variation is simply the different variety of genetic make up and what is called alleles. Alleles are similar to a code for the body which determines such things as hair color, eye color, height, and other factors.
Genetic variation is therefore the variation between genes and alleles, within a small or large group of people. A small group of people would for example be a family. A large group of people would for example be the population of a certain geographic region such as a country.
b. speciation
c. convergent selection
d. stabilizing selection
Speciation occurs when a population suffers divergence. Genetic flow is interrupted between the new groups that keep reproducing and going through mutations. Reproductive isolation emerges. Option B. Speciation.
Occurs when the original population is divided into two or more groups and each group is exposed to different environments.
Each group reproduces for many generations, going through many changes or mutations.
These changes will depend on each group's environment and its ecological pressures.
Pressures act on individuals and make them adapt to the new environmental conditions.
Generation after generation, the genotype of individuals will increase the fitness to survive and reproduce.
The fixation of mutations will increase the difference among both groups, up to the diverging point into two new species.
There are different types of speciation. One of them is Allopatric speciation.
Allopatric speciation refers to the geographical separation of a continuous genetic population, originating two or more new geographicallyisolated groups.
During these events of speciation, emerging new barriers impede genetic flow between groups. The two new populations that are separated can not get together and mate anymore.
These barriers might be geographical or ecological.
After the emergence of the barrier, the two populations evolved separately in different new species.
Two different species that evolved in allopatry might meet again in secondary contact if the barrier that separated them, disappears. However, they will not be able to mate and reproduce due to prezygotic and postzygotic reproductiveisolation.
The exposed example is a case of speciation, in which the chimpanzees' habitat was fragmented and a town was built.
The town acts as the barrier between the two diverged groups, impeding them to meet.
Genetic flow is interrupted and each group keeps reproducing separately, and mutating, leading to genetic changes and reproductive isolation.
After a long period of time, the chimpanzees came back into contact but were incapable of breeding.
This process is speciation. Option B.
You can learn more about speciation at
B) Increase logistically.
C) Decrease rapidly and die out.
D) Remain the same.
The toad population would most likely Increase exponentially.
Exponential growth of species is the unrestricted growth of a population of organisms.
Exponential growth occurs in absence of predators and when resources of food in its habitat are unlimited.
Predation and resource availability are two important factors in exponential growthof population.
Thus, when a species of toads is introduced into a new environment in an attempt to reduce the populations of insects, in absence of any natural predators to toad, the toad population would most likely increase exponentially.
Learn more about, Exponential growth, here; brainly.com/question/10786406?referrer=searchResults
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Answer:
Increase exponentially or a
Explanation: