7. The impermeability of the cell membrane to water-soluble molecules is a result of the: Select one : O A. nonpolar nature of water molecules. O B. presence of proteins that extend through both layers of the membrane. O C. presence of cellulose and other polysaccharides in the membranes. O D. presence of phospholipids in the membrane.

When analyzing tree rings, what do scientists assume a thin ring indicates?

How does upwelling affect coastal fisheries? upwelling damages nutrient supplies at coastal fisheries as the warm, nutrient-rich surface water is replaced by nutrient-poor, cold water. upwelling damages nutrient supplies at coastal fisheries as the cold, nutrient-rich surface water is replaced by nutrient-poor, warm water. upwelling improves the nutrient supply at coastal fisheries as the warm, nutrient-rich surface water replaces the nutrient-poor, cold water. upwelling improves the nutrient supply at coastal fisheries as cold, nutrient-rich water replaces the warm, nutrient-poor surface water.

The illustration shown is an ovum, a female sex cell. a mutation in this cell may be passed to the woman’s offspring during a) birth. b) mitosis. c) dna replication. d) sexual reproduction