How do animals get nitrogen? They break down glucose molecules into nitrogen.
They convert carbon to nitrogen during fixation.
They eat it in plants and other animals.
They breathe it in from the atmosphere.

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. label the following topographic map. click on a label below the map to select it, and then click on the appropriate box on the map to place the label. (increments for contour lines is 50 ft).

How does an angiosperm prevent self pollination

What best describes the dropping height of a ball that bounces back up to a height of 45 cm