41) What are the free-living nitrogen-fixing micro-organisms—Rhizobia
42) Which plant grows very fast—Eucalyptus
43) Red rust on tea exist due to —-Fungus
44) Lichen is a — Symbiotic organism
45) What is called the method of determining the age of plant– Dendrochronology
46) What is the other name of Janufalak— Patella
47) Which type of crop is jute— Commercial crops with fibre
48) What is ikebana—- A type of Japanese flower
49) Eyes of potato useful for--Vegetative propagation
50) Which plant does not produce fruits but seeds—–Cycas……………(Science Quiz)