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Wood first appeared in plants called progymnosperms.
Endocarditis. The human heart has been sectioned to reveal the left ventricle and origin of the aort
Results from sequential study of two cohorts tested at three ages and at three different points in t
At breakfast, a middle-class husband sits absorbed in the newspaper and the public affairs of the da
Over time, cells acquire mutations. Two independently acquired mutations in the same cell may be suf
Incomplete dominance in flowering time of pea plants