The gelatinous, proteinaceous protective covering of a bacterial cell is termed as :

1. Plasmalemma
2. Sheath
3. Cell wall
4. Capsule

Which of the following bacteria converts fruit juices into vinegar ?

1. Acetobacter
2. Rhizobium
3. Lactobacillus
4. None of the above

The part of the seed which stores food is :

1. Seed coat
2. Testa
3. Seed leaves
4. Tegmen

Which of the following category of plants contains seeds inside the cones ?

1. Bryophyta
2. Gymnosperms
3. Pteridophyta
4. Angiosperms