Some sponges have sexes, but most are hermaphrodites, or are sexless. A sponge can reproduce asexually through budding. However, most  sponges reproduce sexually by releasing sperm cells into the water  to fertilize ova.ponges are reproduced asexually by process of budding, which have great power of regeneration and sexually sponges are produced by gametes formation method.
The tools used, the safety measures taken and the urgency of completion are different for every project, and all of these factors can influence the total price. If you want a rough estimate to start budgeting, however, plan for the cost of professional sandblasting to be anywhere from $916 to $1,198.Before you hire a professional to start sandblasting the exterior of your home, make sure that you fully understand how the process works.aking Permits and Neighbors Into Account. Sandblasting may be quick, but it is such an intensive method that permits are often required before work can begin. Make sure to build in time and budget for the cost of this additional requirement.
1 Asphalt driveway paving costs $2-$6 per square foot installed. 2  For a 500 square foot (50 x 10) driveway this works out to an average cost of $2500. 3  A Macadam driveway, also known as tar and chip, consist of crushed stone or gravel sprayed with liquid asphalt.4  They cost around $2-$5 per square foot. A concrete driveway 90 feet long and ten feet wide would be around $1800 for materials plus an additional $2000 or so for labor, for a total cost of nearly $4000. 2  Asphalt driveway paving costs $2-$6 per square foot installed. 3  For a 500 square foot (50 x 10) driveway this works out to an average cost of $2500.