Answer:
nope that not possible because O has no antigens which can donate any blood group but A donates to same blood group bcoz of same antigen.
Answer:
Organism
Explanation:
The other options are all smaller than an organ system.
A cell is the smallest. Many cells make a tissue, many tissues form an organ and many organs form an organ system. Many organ systems form the organism :))
Answer:
Trichocyst is a structure in the cortex of certain ciliate and flagellate protozoans consisting of a cavity and long, thin threads that can be ejected in response to certain stimuli. Trichocysts may be widely distributed over an organism or restricted to certain areas.
Explanation:
