As soon as the neural tube is formed, the anterior<span>portion expands quicker than posterior, forming the primary brain vesicles: Prosencephalon (forebrain), Mesencephalon (midbrain), and Rhombencephalon (hind brain).</span>
Answer: Plants access glucose by photosynthesis and Animals access it by breaking down there food. During cellular respiration, glucose combined with oxygen to release energy and to form carbon dioxide and water.
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A single gene disorder is one that's known to be caused by a single gene. Multiple gene disorders, however, can be caused by multiple gene combinations and other factors. Dominant genes are always expressed in the offspring, while recessive genes are only expressed if the offspring recieves the recessive gene from both parents. Sex-linked genetic disorders occur most often in men, and are caused by a single-gene disorder gene being on the X chromosome but not the Y, so that the offspring needs only one recessive gene to have the trait/disorder.
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