Biology help.. only a few questions..?

[Sara]

I need help with only a few question.. please help..

1.) State one way a child could develop an immunity to a certain disease without being vaccinated.

2.) If ABO group is considered, an individual with type A blood can safely receive a pint of blood from a donor whos genotype is:

a.) Ib i b.) Ia Ib c.) Ib ib .) ii

3.) Human blood types in the ABO blood group are identifies by?

1.) a series of enzyme-controlled synthesis reactions
2.) micropscopic examination of white blood cells
3.) clotting factors in the plasma
4.) antigen-antibody reactions

35.) Which statement does NOT identify a characteristic of antibodies?
1.) they are nonspecific, acting against any foreign substances
2.) they may be produced in response to an antigen
3.) they are produced by the body in response to the presence of a foreign substance
4.) they may be produced by white blood cells.

your help would be great =)

[bananabreath247]

1. Passive immunity by mother's milk, or active immunity by fighting off the disease.
2. d. ii, because the anti-B antibodies will not target type O blood.
3. answer d, or as you say, 4. antigen-antibody reactions. It's when the antibody results in clotting of those cells that the cells can be identified as having that specific antigen.
35. 1. they are nonspecific, acting against any foreign substances. Nope, antibodies act against only the particular antigen they were created for.

Good luck!