Imagine that today at 1:00 pm, a single Salmonella bacterial cell landed on potato salad sitting on your kitchen counter. Assuming optimal conditions for bacterial growth, how many bacterial cells will be present at 3:00 pm today?

The type of fossil where the name literally means "turning to stone".

Click an item in the list or group of pictures at the bottom of the problem and, holding the button down, drag it into the correct position in the answer box. release your mouse button when the item is place. if you change your mind, drag the item to the trashcan. click the trashcan to clear all your answers. show the flow of energy in the following ecosystem by labeling each organism's link in the food chain. click once to select a label. click again to place the label in the correct location.

Sarah and john are having a discussion on genetic diversity sarah believes it happens over a long period of time john believes it happens immediately who is correct