Animals possess nerve or nervous systems to respond to their environment. But the single celled Amoeba does not possesses any nerve cell. so, how it come to know whether a particle it encounters is a grain of sand and not its dinner by?
A. thermotaxis
B. skin
C. hormones
D. chemotaxis
Answer:D
Animals possess nerve or nervous systems to respond to their environment. But the single celled Amoeba does not possesses any nerve cell. so, how it come to know whether a particle it encounters is a grain of sand and not its dinner by?
A. thermotaxis B. skin C. hormones D. chemotaxis