Tom grew three inches in one year. Which organ system was directly responsible for his growth spurt? A. Respiratory system
B. Digestive system
C. Circulatory system
D. Endocrine system,

sand 60

clay 10

silt 30

sandy loam should be dominated by the sand. as the amount of sand increased, the amount of slit needed to anchor the plants' roots to the sand will also be increased. even though the amount is very little, 10% part of clay is still necessary for proper oxidation.

meteorologists would compare a new weather map with one 24 h old to see how fast a front is moving.

the sugar-phosphate backbone forms the structural framework of nucleic acids, including dna and rna. this backbone is composed of alternating sugar and phosphate groups, and defines directionality of the molecule.

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