Entire surface of the organism is in contact with the environment for taking in food.
A. (i) and (iii)
B. (ii) and (iii)
C. (ii) and (iv)
D. (i) and (iv)
Answer:C
Entire surface of the organism is in contact with the environment for taking in food.
A. (i) and (iii) B. (ii) and (iii) C. (ii) and (iv) D. (i) and (iv)