I would say estuary, because that's where a fresh water river and an ocean meet, and that leads to a transition between salt to fresh water.
Answer:
Gestation period is the fetal development period from the time of conception until birth.
It is flase. can be multiply.<span />
One of the reasons the plasma membrane can have<span> selective permeability</span><span> it's because it's composed by a bi-layer of phospholipids.
The interaction between them and other molecules will influence how these molecules will cross the membrane. If the molecule it's </span>hydrophobic it can easily cross, if it's polar molecules and ions( hydrophilic), they cannot cross easily.
In ecology and biology, abiotic components are non-living chemical and physical factors in the environment which affect ecosystems. Biotic describes a living component of an ecosystem; for example organisms, such as plants and animals. All living things — autotrophs and heterotrophs — plants, animals, fungi, bacteria.