19.
Find out the correct statements: I. Diatoms are unicellular plants II. Diatoms are found in water III. Diatoms have silica coatings IV. Diatoms are not green in colour
Answer : B. II,III and IV
20.
based on the cellular type the algae chlorella belongs to
Answer : D. Both A and B
21.
Plastids are used as vectors in gene transfer. They are present in
Answer : D. certain bacteria
22.
The largest flower is
Answer : C. Rafflesia
23.
Bacteria are
Answer : C. Both A and B
24.
Grasses have
Answer : A. fibrous root system