Answer:
The correct answer is d. hydronium ion.
Explanation:
Hydronium ion is a positively charged molecule that has three hydrogen atom bonded with an oxygen atom. Hydronium ion is formed when the water molecule gains an extra H+ ion from somewhere.
This H+ ion easily form bonds with one of the lone pairs present on the water molecules. H2O is also a polar molecule and has a partially positive charge due to which the extra H+ ions get attracted to the negative pole of water and make hydronium ion. Therefore the correct answer is d.
Answer:
Test a known bloodstain as a positive control and a blank (filter paper) as a negative control (see interpretation of results to determine a positive and negative result).
1. open ocean
2. inter tidal zone
3. coastal zone
Answer:
Humoral immunity
Explanation:
Adaptive immunity is of two types: cell-mediated immunity and antibody-mediated immunity. Antibody-mediated immunity includes B cells. The function of B cells is to transform into plasma cells which in turn form antibodies. Antibodies are also called immunoglobulins and bind with a specific antigen to generate an immune response. Body fluids or humor include blood and lymph. Since the antibodies bind to the antigens in body fluids (blood and lymph), the antibody-mediated immunity is also called humoral immunity.
