Primary succession occurs when pioneer species of vegetation take hold in an area devoid of previous growth and sometime soil. Examples would be an area covered by lava or an area left by a retreating glacier. The pioneer species add layers of soil over time through decomposition and "normalize" the environment for other species to follow. Secondary succession occurs when an area is significantly reduced in vegetation species, such as occurs during a flood or fire. Soil is still present and so may be seeds, roots, and other underground vegetative organs of the previous inhabitants.
A good example of primary succession takes place after a volcano has a secondary succession is a process started by an event.
one starts with rock the other with soil.
http://wiki.answers.com/Q/What_is_the_main_abiotic_factor_that_distinguishes_primary_from_secondary_succession"
Climax community is the final stage of succession. It is where you have a stable community of all the different organisms that live together in a state of balance until a Natural disturbance happens and the whole succession starts over again.
no se next please
A primary source is an original and firsthand account of an event or topic, created at the time of the event by someone who witnessed or experienced it. A secondary source, on the other hand, is an interpretation or analysis of primary sources by someone who was not directly involved in the event or topic. Secondary sources are often based on primary sources but provide a different perspective or analysis.
Tertiary response often/usually refers to the act of dealing with a problem, and correcting its effects, after it has already happened. This differs from primary response, which refers to the acts of preventing a problem before it occurs, and secondary response, which refers to addressing the problem in progress.
Primary storage, also known as main memory or internal memory, refers to the storage space in a computer that is directly accessible to the processor. Primary storage is typically used to store data and instructions that are currently being used or processed by the computer. Secondary storage, also known as external memory, refers to storage space that is not directly accessible to the processor, but is used to store data and instructions for longer periods of time. Secondary storage is typically used to store data that is not currently being used, but that needs to be kept for future reference. There are several key differences between primary storage and secondary storage: Speed: Primary storage is generally faster than secondary storage, as it is directly accessible to the processor. This means that the processor can access and retrieve data from primary storage more quickly than it can from secondary storage. Capacity: Primary storage is typically smaller in capacity than secondary storage. This is because primary storage is used to store data that is currently being used or processed, while secondary storage is used to store data that is not currently being used. Cost: Primary storage is typically more expensive than secondary storage, as it requires faster and more expensive memory chips. Volatility: Primary storage is generally volatile, meaning that it is lost when the power is turned off. In contrast, secondary storage is non-volatile, meaning that it retains data even when the power is turned off. Location: Primary storage is located inside the computer, while secondary storage is typically external to the computer and is connected to the computer through a port or interface.
A closed primary election is one in which voters choose from candidates only from the party in which they are registered. This differs from an open primary in that an open primary allows a voter to cast his/her vote within whichever contest (Democrat, Republican, Green, etc.) the voter chooses.
There are two types of keys in any database; composite and primary keys. Composite key differs from primary key in that it contains more than one column while primary key is composed of only one field and cannot have a null value.
found another spot listed the Shi'ite as the primary diff. makes sense.
Foreign keys are used to link one database with another. A primary key is an attribute of a record that allows users to identify information.