Which is a useful product of epidermal origin?
Saffron
Cotton Fibres
Clove
Jute
B.
Cotton Fibres
Cotton is obtained from the epidermal hair present on the surface of seeds of Gossypium sp. These are made up of cellulose only and may be of two types, i.e., extractable lint and non-extractable fluffy fuzz. Cotton fibres are mainly used for textiles, celluloid, cellophane, rayon and paper pulp.
Calyptra develops from
Venter wall of archegonium
Outgrowth of gametophyte
Neck wall of archegonium
Paraphysis of the archegonial branch
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 tissues consist of living cells?
Vessels
Tracheids
Companion cell
Sclerenchyma
A monocarpic plant is one, which
has only one carpel
Flowers once in a life-time
Produces only one seed
Produces only one fruit
Which of the following cell organelles stores hydrolytic enzymes?
Centriole
Lysosome
Chromoplast
Chloroplast
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 is associated with photorespiration?
Mitochondria
Peroxysome
Chloroplast
All of these
