Which of the following animals do not have backbone ?
(a) 1, 3, 4
(b) 3, 4, 5
(c) 1, 2, 6
(d) 1, 2, 5
Which of the following animals do not have backbone ?
(a) 1, 3, 4
(b) 3, 4, 5
(c) 1, 2, 6
(d) 1, 2, 5
Which of the following animals do not have backbone ?
(a) 1, 3, 4
(b) 3, 4, 5
(c) 1, 2, 6
(d) 1, 2, 5