An example of an asexual organism can be jellyfish or corals, they release there eggs and sperm into the water where they combine and grow on their own. Research the details, many diagrams.
The exact cause is not known It mihht be 2 or more diseases not yet defined
Underground, at the point where slippage along the fault begins.
Velocity is a measure of how fast something moves in a particular direction. In other words, a velocity is a speed with a direction. For instance, if an object moves east at 9 metres per second (9m/s), we would say that its velocity is 9 m/s to the east.
Gradient The formal definition of a concentration gradient is the process of particles, which are sometimes called solutes, moving through a solution or gas from an area with a higher number of particles to an area with a lower number of particles. The areas are typically separated by a membrane.