There are multiple lines of evidence that provide support for common ancestry and evolution. Write 3-4 paragraphs describing at least three of them in detail. Provide at least one example for each line of evidence. —— Answer below

There are multiple lines of evidence that provide support for common ancestry and evolution. These include homology, direct observations, and the theory of continental drift.

First off, homology refers to similarities amongst organisms due to common ancestry. This can include any observable exterior features of organisms, such as their limbs or similarities that lie in DNA. For instance, a DNA sequence that has been widely preserved throughout numerous organisms is an approximately 180 nucleotide sequence known as the homeobox that is responsible for dictating the body structures of organisms. Similarities and differences among biological molecules can be used to determine species relatedness.

In addition, fossil records provide visual evidence of evolution. It directly allows us to pinpoint if there are any similar structures amongst organisms and see if there are any vestigial structures from ancestors that remain in organisms. For instance, some of the best-studied fossils are of the horse lineage. Using these fossils, scientists have been able to reconstruct a large, branching "family tree" for horses and their extinct relatives. Changes in the lineage leading to modern-day horses, such as the reduction of toed feet to hooves, may reflect adaptation to changes in the environment.

Lastly, the theory of continental drift. Continental drift justifies certain lines of evolution and common ancestry. For example, in the 1950s, there was a worldwide effort to eradicate malaria by eliminating its carriers. The pesticide DDT was used to kill the mosquitoes. At first, it was highly effective however, over time, the DDT became less effective, and more mosquitoes survived. This was because the mosquito population evolved resistance to the pesticide. Some populations, like those of microbes and some insects, evolve over relatively short time periods and can be observed directly. The theory of continental drift can help us to answer questions and understand the theory of evolution from the scope of location.

In conclusion, there are many ways to find common ancestry and evolution. Using homology, fossil records, and continental drift you can find evidence that supports common ancestry and evolution.

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explanation:

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answer: 21

step-by-step explanation:

divide 630 by 30. 30 goes into 630 21 times

question#1

ans:

cell is the basic unit of organization of all living things. cells are often called the building block of life and it is the smallest unit of life. the study of cell is called cell biology. cell consists of cytoplasm enclosed within membrane, which contain bio-molecules such as proteins and nucleic acid.

two third of cell is water, which means that two-third of your whole body is water. the rest is the mixture of molecules, mainly proteins, lipids and carbohydrates.

question#2

ans:

organ:

an organ is a group of tissues specialized to form a functional unit. an example is the heart in animals.

organ system:

an organ system is a group of several organs whose functions are synchronized to release an effective action in a living organism. an example is digestive system.

question#3

different systems perform different function at tissue level. for example, the respiratory system facilitates breathing. in the alveoli tissue of the lungs, the exchange of oxygen and carbon dioxide molecules between the air and the bloodstream occurs by passive transport, so that oxygen is taken in and carbon dioxide and water are removed. different systems of the body carry out different functions. for example, your digestive system is responsible for taking in and processing food, while your respiratory system working with your circulatory system is responsible for taking up oxygen and getting rid of carbon dioxide.

question#4

different systems perform different function at tissue level. for example, the respiratory system facilitates breathing. in the alveoli tissue of the lungs, the exchange of oxygen and carbon dioxide molecules between the air and the bloodstream occurs by passive transport, so that oxygen is taken in and carbon dioxide and water are removed. different systems of the body carry out different functions. for example, your digestive system is responsible for taking in and processing food, while your respiratory system—working with your circulatory system is responsible for taking up oxygen and getting rid of carbon dioxide.

question#5

our body works because of the interactions that happen between organs and organ systems.  

for example:  

the heart to regulate blood flow throughout the body. the blood carries oxygen and nutrients to the cells and carries carbon dioxide and waste away from the cells. body systems work together in maintaining a constant internal environment. when this balance is disrupted, the body systems may not function properly, and human health can suffer.   you start to feel bad.