Fresh water is any body of water with a low salt concentration. Organisms in fresh water various challenges which includes; Osmotic concentration such that fresh water is permanently dilute and most cells cannot function at this concentration of ions. Varying temperatures, variation in oxygen levels and reproduction and life cycle due to permanence of habitat and physiological difficulty of regulating osmotic concentration in larvae and juveniles.
Answer:
The troposphere is the lowest layer
Explanation:
hope this helps!! there could be more that are right I'm just not sure so
nucleolus
they are made up of subunits and these subunits are made within the nucleus by the nucleolus. Then they are assembled in the matrix of the nucleus.
Answer:
1) mutations 2) sickle cell anemia. Hope this helps you :)
Explanation:
Rain is the correct awnser