Answer:
If Red blood cell is placed in a hypotonic solution, the water moves into the cell. The cell swells and become turgid.
Explanation:
This is a type of osmosis. here plasma membrane of RBC works as semipermeable(only solute can move) osmotic membrane.
We all know that, osmosis is a process where liquid moves across semipermeable membrane from less concentration gradient to high concentration gradient.
There are three types of solution in respect of the concentration of cell's cytoplasm. These are
- Hypotionic (when the solution is dilute than the conc. of cytoplasm). In this condition water moves into the cell and the cell become turgid. this is known as deplasmolysis
- Hypertonic ( when the solution is concentrated than cytoplasm), In this condition water moves out from the cell and the cell become flaccid. This is known as plasmolysis.
- Isotonic (when both the conc. of cell and solution are same). No osmosis takes place.
I believe the answer is d
Answer: Option C) "excludes agricultural runoff"
Explanation:
The Clean Water Act (CWA) established in 1972 is a federal law made in United States to address the adverse effect of water pollution. The act was aimed to maintain the physical, chemical, and biological integrity of the nation's waters.
A major shortcoming of the Clean Water Act (CWA) is agricultural runoff which is a nonpoint source (NPS) pollution. Large scale agriculture activities have an adverse impact on groundwater and surfacewater as they carry heavy fertilizer, pesticide and water inputs.
The federal CWA establish water quality standards and total maximum daily loads (TMDLs) to asses the pollution caused by agricultural water with the help of regulatory mechanisms.
Hence, the correct option C.
Answer:
O to kill bacteria that cause disease
Explanation:
penicillins are a group of antibiotics used to treat a number of bacterial infections.
hope this helps!
