B. Group number
For example, Sodium(Na) is in Group 1 and Na^+ has a charge of +1.
Answer:
this is called revolution ( when the sun gives light to the earth it takes a step closer to revolution were season of the year appear )
The Centrosome is the organelle responsible for organizing the cell into two parts in preparation for cell division. It develops the spindle fibers used in cell division.
The solution is B.
Answer: E. Polygenic
Explanation: The color of eyes and hair is due to quantity and accumulation of pigments such melanin. Melanin is synthesize by multiple enzymatic steps and every enzyme is codified by a different gene. That means polygenic inheritance, that several genes are implicated in determined the this trait and its difficult to trace since every gene has a sequence that can vary between families or human groups.
