The region of the optic nerve lacking photoreceptor cells is known as optic disc.
Answer:
It takes about one month for the Moon to orbit Earth (27.3 days to complete a revolution, but 29.5 days to change from New Moon to New Moon). so both are around a month but are not the same,The moon orbits the Earth once every 27.322 days(revolution),It also takes approximately 27 days for the moon to rotate once on its axis(rotation).
Explanation:
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B: alfred wegener 100%
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The model of urban growth that views the city as a series of somewhat circular zones occurring outward from its center is called the Concentric zone model.
The term Robert Park used to explain the back and forth communications between members of a crowd during unrest was Circular reaction
Answer:
B--Organism
Explanation:
Different levels of biological organization start from the least complex object and end at the most complex. Every object has objects preceding it that it is made up of.
In this question, the organ system is made up of several organs. A community is made up of several populations of different people. Think about this now: what makes up a population and is made up of organ systems? The most logical answer here according to the flow is B--an organism. An organism is made up of organ systems and makes up a population, which in turn allows several populations to make up a community.
