Enzymes are important because they a. contain water b. speed up chemical reactions c. contain genetic material d. the cell maintain its shape 2 which term refers to the diffusion of water through a membrane a. osmosis b. engulfing c. active transport d. facilitated transport

Hurry which of these is true about index fossils? a) are very scarcely found b) used as guides in relative dating c) found in the youngest layer of the rock d) used as reference points in absolute dating

'which of these statements about the scientific method is not true? all experiments must follow the same number of steps in the procedure. experiments may be repeated several times. some unexpected results can be beneficial. experimental results may or may not support the hypothesis.

Solutions to environmental problems in europe must