Which plant organ is responsible for supporting the weight of the plant? A. the flower
B. the stem
C. the leaves
D. the roots

When lactate builds up in a runners muscles it causes a burning sensation what causes this to occur

An uncomfortable feeling in the ears when descending in an airplane is caused by changes in air pressure on the: a. inner ear b. middle ear c. eardrum d. hammer/anvil

Which base is found only in rna? ribose othymine ouracil o deoxyribose detecteet