One basic internal signal that triggers Cell division is 'the size of the Cell'.
External signals that do this exist...
Internal cell regulators are proteins that respond to changes within a cell.For example, a normal cell will not enter the mitosis stage of cell division till the entire DNA is replicated. This check is regulated by a protein within the cell. This protein is the internal cell regulator.
Bluegills have internal fertilization, where the male releases sperm inside the female's body to fertilize her eggs.
External regulators are proteins that respond to events outside the cell. These proteins direct cells to speed up or slow down the cell cycle, like traffic lights. For example, growth factors are one of the most important external regulators, and they stimulate the growth and division of cells. These differ from internal regulators in the fact that they respond to events inside the cell. Internal regulators allow the cell to proceed only when certain processes have happened inside the cell. Hope this helps! : )
The fluid link between the external and internal environment is the plasma membrane of cells. It acts as a selectively permeable barrier that regulates the passage of substances in and out of the cell, maintaining the cell's internal environment while interacting with the external environment.
Organisms that do not regulate their internal conditions are called poikilotherms. They rely on external sources to maintain their body temperature, such as by moving to warmer or cooler areas. Examples include reptiles, amphibians, and many invertebrates.
examples of internal and external validity
mash
external influences on phenotype
the difference between internal and external customer is that internal customers are the employees of the company whereas the external customers are only the customers outside the organisation.....
internal and external combustion engine
internal external not internal external not
internal sources are personnel, colleagues and the library whereas external sources can be consultants andservice providers and catalougues.
its internal
an indicator which is dissolved in the solution in whicdh the main reaction takes place- internal g. phenopthlein
internal and external factors regulate the cell cycle
internal and external factors regulate the cell cycle
Discuss internal and external threats that companies face today and ways that you can minimize those threats. List and explain three examples.