Question

Why organ system level is less complex in plants

Answer 1

Answer:

because plants can't move like animals.

they have to do all the functions on the same place.

therefore, in comparison to animals the organ system level is less complex in plants.

Answer 2

Answer:

"The organ level of organization is much less definite in plants than it is in animals. At most, we might distinguish roots, stems, leaves, and reproductive structures. ... Organs are parts of organ systems where total functions are carried out. Thus, excretion is handled by the kidneys, ureters, bladder, and urethra.