"Endarch is the arrangement in which the protoxylem is directed towards the centre and metaxylem elements towards the periphery."
"Exarch is the arrangement in which the protoxylem is directed towards the periphery and the metaxylem towards the centre."
-biology.lifeeasy.org
C) Doppler Effect
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Answer:
Answer: cells
sickle cell anemia is not expressed
Explanation: