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.
Dethatching or power raking moves away dead grass, excess grass and putting holes in the ground and is considered another method of aeration that costs less. It can cost between $100 and $200 depending on the size of your lawn. See how much lawn aeration costs if you have it done professionally.he national average estimate for lawn mowing and maintenance is between $214 and $322. It will often include a cut, weeding, trimming and pesticide treatment. Some services will price individually, while others will have monthly or weekly packages.