Concept:Cells that share the same role in the body are identified by comparing their functions.
Explanation:Spermatozoon (sperm cell) and ovum (egg cell) are both gametes.
Their primary function is reproduction.
During fertilisation, they fuse to form a zygote.
The other pairs have different functions:
Check cell and red blood cell differ in support and oxygen transport.
Palisade cell and epidermal cell differ in photosynthesis and protection.
Root tip cell and guard cell differ in growth and stomatal regulation.
Thus, only the spermatozoon and ovum perform the same general function.
Answer:B. Spermatozoan and ovum