Which types of organisms developed first due to the early environmental conditions on Earth?
C. eukaryotic and aerobic
D. eukaryotic and anaerobic
A. prokaryotic and aerobic
B. prokaryotic and anaerobic

Asap! how does the distance between two objects affect the force of gravity? how is the moon dependent on the sun?

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).

Restriction enzymes are used in making recombinant dna. describe the role restriction enzymes perform when constructing recombinant dna.