Which of the following would NOT be classified as a lymphoid organ?
A) Peyer's patches of the intestine
B) pancreas
C) spleen
D) tonsils

B. Pancreas

Explanation:

Lymphoid organs can be grouped into Primary and Secondary.

Primary Lymphoid Organs include; Thymus and Bone Marrow, responsible for the provision of micro-environments to aid the development and maturation of T-lymphocytes.

Secondary Lymphoid Organs include; Spleen, Peyer's patches of the intestine,Tonsils, Adenoids, Lymph nodes  and Appendix. Together, they provide the environment for the interaction of lymphocytes with the antigen, which then multipy to become effector cells.

hi~~

i would say that hybridization occurs frequently in nature, because there are many types of hybrids that have occurred naturally, such as the mule (male donkey + female horse)