The role of spindle fibers is to form protein that separates genetic material inside a cell.
I believe the correct answer is B. Nephridia are excretory organs. They are organs found in invertebrate animals that are present in pairs and are responsible for performing functions that are similar to the kidney of a vertebrate. They excrete wastes from metabolic processes.
Answer:
The correct answer is A. Cells are the basic unit of life.
Body b will have a force 4 times stronger than body a, causing body b to reverse the direction of body a