The abiotic factors in salt marshes include:
1. High, variable salinity
2. Low oxygen levels
3. Turbidity
4. Varying temperature
5. Sulphide toxicity
Salt marshes occur in zones between low and high tides. Salt marshes are periodically flooded by tides , so the plants living there have had to adapt to being submerged in salt water.
Only a limited number of plant and animal species can tolerate the harsh conditions of salt marshes and therefore salt marshes are generally poor in species.
Answer:
Cell membrane is also called as semi permeable membrane.
Explanation:
It allows some chemical compounds to pass through and stops the other from their entry.
Because it is meant to be like that for animals , us humans dont need all the stuff that animals do.
The controlled variable is something that must stay the same in order to keep the experiment fair