abida Archive

TYPE: PYTHIUM

Occurrence It is common in soil water. Its various species live as saprophyte. Some of them live on decaying plant as parasites. The parasitic stage attacks the roots and the seedlings. It causes disease Damping-off. Pyd him debaryanum causes this disease. Some species are

Characteristics of Wood

CHARACTERISTICS OF WOOD Wood is a I–41 fibrous tissue found in many plants. It has been used for centuries ice noth fuel and as a construction material. It is composed of 2 natural composite of cellulose fibers (which are strong in tensio .) embedded

Apiaceae (Umbelliferae) Carrot Family

Appendix Apiaceae (Umbelliferae) Carrot Family Diagnostic characters Habits: Annual or perennial herbs rarely shrubs. Roots: Tap root, branched, sometimes, tuberous due to presence of stored food. Stem: Herbaceous stem, erect or prostate with swollen nodes. Leaves: Petiolate, Alternate, simple, exstipulate, reticulate venation. Usually sheathing

MULTIPLE CHOICE QUESTIONS OF GYMNOSPERMS

MULTIPLE CHOICE QUESTIONS OF GYMNOSPERMS 1.  Which of the followings is correct for vascular bundle of gymnosperms? (a) Stele           (b) Exarch        (c) Collateral (d) Conjoint 2.  Secondary growth occurs by the activity of: (a) Phloem       (c) Xylem        (c) Cambium (d) Bark 3.  Which of

SHORT QUESTIONS OF GYMNOSPERMS

SHORT QUESTIONS OF GYMNOSPERMS 1.  Give occurrence of Gymnosperms. Ans: Gymnosperms are naked seeded plants. Gymnosperms are a group of ancient plants. They become dominant in the Jurassic period. Most of the gymnosperms are evergreen trees. Some shrubby plants are also found in this