A farming method that involves creating and planting small flat areas on the sloping sides of hills or mountains is called . A.
terracing
B.
contour farming
C.
crop rotation
D.
erosion

Which of these is not a function of some membrane proteins ? a.allowing polar molecules to enter the cell b.recognizing other types of cells c.receiving messeges from other cells b.carrying messages to oher cells

Which of these organisms have the greatest amount of cell specialized

How does pregnancy begin? a) a placenta forms in the uterus b) a sperm reaches an egg in the fallopian tubec) the blastocyst differentiates into two cell types d) contractions begin in the uterine wallapex