People with type ab blood are considered the "universal recipient" for transfusions because their blood is plentiful in a and b antibodies. they are usually rh negative. their blood lacks a or b antibodies. their blood cells lack a and b antigens. they usually have very strong immune systems.

The correct answer is their blood lacks A or B antibodies.

People with type AB blood have A and B antigenes on the surface of red blood cells (RBCs). AntigenAB  has no antibodies, thus, transfusion can be considered safe ( the serum of the recipient does not contain antibodies for the blood cell antigens of the donor).

because the light is a great source of energy for the plants to survive. (i hope this )

1. a host loses nutrients to a parasite

2. a parasite only benefits when the host is alive (cause if the host dies the parasite dies with it )

3. producers to consumers

4. the tapeworm is a parasite

5. they convert energy from the sun (photosynthesis)

6. sunflower-robin (i think im 80% sure)

7. producer

8. consumer

9. prey

10. fresh water snails ( cause the green algea is the producer and the snails are the primary consumers and the small fish consumer so is the big fish)