31.

Which of the following tissues consist of living cells?

• Vessels

• Tracheids

• Companion cell

• Sclerenchyma

Which is a useful product of epidermal origin?

• Saffron

• Cotton Fibres

• Clove

• Jute

 Fern spores are usually

• Haploid

• Diploid

• Triploid

• Tetraploid

Nucleotides are formed by

• purine, sugar and phosphate

• purine, pyrimidine and phosphate

• purine, pyrimidine sugar and phosphate

• pyrimidine, sugar and phosphate

Which of the following plant cells is not surrounded by a cell wall?

• Root hair cell

• Stem hair cell

• Gamete cell

• Bacterial cell

Which of the following cell organelles stores hydrolytic enzymes?

• Centriole

• Lysosome

• Chromoplast

• Chloroplast

A monocarpic plant is one, which

• has only one carpel

• Flowers once in a life-time

• Produces only one seed

• Produces only one fruit

Calyptra develops from

• Venter wall of archegonium

• Outgrowth of gametophyte

• Neck wall of archegonium

• Paraphysis of the archegonial branch

 Protonema is the stage in the life cycle of

• Cycas

• Funaria

• Selaginella

• Mucor

Which of the following cell organelles is associated with photorespiration?

• Mitochondria

• Peroxysome

• Chloroplast

• All of these