The correct answer of the given question above would be the third option: THE EVOLUTION OF POPULATIONS OVER TIME. What is represented by the base of a phylogenic tree is the evolution of populations over time. It is also known as the evolutionary tree. This tree shows the evolutionary relationships among species.
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What are leukocytes?</h2>
Leukocytes are colorless cells that circulate in the blood and belongs to the body's immune system and helps the body fight infections and other diseases.
<h2>
What is their function?</h2>
Leukocytes are responsible for fighting other diseases and protecting your body from infections. Since they are part of the immune system, leukocytes circulate your blood and help cure injuries or illness.
Fractures are common injury during childhood with 8 to 12 percent. For toddlers like of a 3 years old femur fractures usually comes from a low energy fall. The doctor after an x-ray puts the affected leg in a Spica cast. In order to obtain history of what happened prior and during the injury, it would be better to ask the parents first especially if they are present during the incident. Afterwards, if they are not present those who witnessed the incident can be asked like if a teacher was present she can attest to what really happened.
