Tubers - they can act as both a source and sink for molecules such as glucose
Plants showing hydrotropism grow in response to water.
Speciation is b. the process by which new species are formed. They are often caused by the isolation of certain organisms in terms of environment or geographical area. This is part of the evolutionary changes that various species undergo to brought about by natural selection.
The term that is being described above is SETTLING POINT. This term has been adopted by some researchers which refers to how our weight thermostats are rather adaptable and are affected by biological factors in the environment. This is based on the setting-point hypothesis.
The G1 phase is a period in the cell cycle during interphase that happens after cytokinesis.
