1. Which of the following animals does not have nervous system?
(a) Leech
(b) Tapeworm
(c) Amoeba
(d) Snail
2. Which of the following causes Malaria ?
(a) Insect
(b) Bacteria
(c) Protozoa
(d) Virus
(a) Leech
(b) Tapeworm
(c) Amoeba
(d) Snail
2. Which of the following causes Malaria ?
(a) Insect
(b) Bacteria
(c) Protozoa
(d) Virus