A 40 years old male who is experiencing movement problems that begin in the face and arms and eventually affect the entire body is likely to undergo diagnosis against Huntingtons disease. It cause progressive breakdown of nerve cell in the brain. In addition it interfere . with persons physical and mental abilities.
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Answer:
The phloem carries important sugars, organic compounds, and minerals around a plant. Sap within the phloem simply travels by diffusion between cells and works its way from leaves down to the roots with help from gravity. The phloem is made from cells called 'sieve-tube members' and 'companion cells'.