Why can the geologic record be analyzed by looking at different rock layers? a : all layers have the same age. b : the layers have different ages with the youngest layers on top. c : the layers have different ages with the oldest layers on top. d : the layers have different ages with the youngest layers on bottom.

What is the best conclusion based on this data? the hypothesis was not supported because the data indicated that fertilizing plants does not improve plant growth. the hypothesis was supported; to get the best growth, use 5 milliliters of fertilizer per plant. the hypothesis was not supported; the data indicated that too much fertilizer can inhibit plant growth. the hypothesis was supported; to get the best growth, use 15 milliliters of fertilizer per plant.

Which example best describes a reflex action? a. eating food when hungry b. coughing when the throat is irritated c. bending down to lift a heavy object d. going for a walk outside

When you aware sick your body produces more leukocytes. briefly describe where the leukocyte are formed, how they are transported, and where they may be stored.