Filamentous actin is polar and, therefore, the two ends of the filament are different. Because of this polarity, the filaments often fit into other cellular structures in only one orientation, in a similar manner to how many of the parts of man-made structures are assembled. Growth, the addition of monomeric actin to the filament, occurs predominantly in one direction; the plus direction.
Larger landscaping rocks, such as boulders, can cost upwards of $800 per ton. For example, a volcanic rock can cost $600 per ton, and an Artic white boulder can cost $150 per ton. Natural stone edging, ideal for gardens and walkways, can cost $200 to $600 per ton.
Advertisement-Continue Reading Below. Landscapers charge according to the size of the stump. Expect to pay between $90 and $150 to have a 24-in.-dia. stump removed. You can rent a gas-powered stump grinder for about $100 to $190 per day, depending on the size of the machine.Therefore, if you only have to remove a stump or two, you'd be better off hiring a pro.xpect to pay between $90 and $150 to have a 24-in.-dia. stump removed. You can rent a gas-powered stump grinder for about $100 to $190 per day, depending on the size of the machine. Therefore, if you only have to remove a stump or two, you'd be better off hiring a pro.