Division Chlorophyta Class Chlorophyceae Order Conjugates Sub-order Zygnemoideae Family Zygnemaceae Genus Spirogyra Occurrence Spirogyra is a large genus. It is widely distributed and found throaghout the world. It has of…
OBJECTIVES Multiple Choice Questions MCQs 1. Portuguese man of war is: (a) Hydra (b) Physalia (c) Sea anemone (d) 550 Jelly fish 2. Multicellular organisms formed year ago: (a) 400 …
Poaceae (Grass Family) Diagnostic characters Habit: Annual or perennial herbs; rarely tree (bamboos. Roots: Fibious adventitidus. Stem: Herbaceous; cylindrical; jointed, hollow at intemodes. Sometimes, forms rhizome or runner. Leaves: Sessile…
(Onion Family) Diagnostic characters I. Habit: Mostly annual or biennial herbs. Some plants are xerophytic. Roots: Fibrous adventitious roots. In some cases roots become tuberous. Stem: Herbaceous; fleshy in…
(ASTERACEAE (COMPOSITAE) Sunflower Family) Diagnostic characters Habit: Annual or perennial herbs or small shrubs or small tree or climbers. Roots: Fibrous tap root Stein: Herbaceous; spiny or without spines; cylindrical,…
Occurrence Volvox is freshwater algae. It makes water green. It appears in the spring. General structure Vegetative structure Volvox forms colony. The colony of volvox is called coenobium. It is…
Kingdom: Plantae Division: Chlorophyta Class: Chlorophyceae , Order: Volvocales Family: Chlamydomonadaceae Genus: Chlamydomonas algae كلاميدوموناس Occurrence Chlamydomonas has 150 species. It is the commonest unicellular Volvocales. It is one of the…
The flow of energy through an ecosystem is called ecological energetic. Energy is the ability to do some work. The sun emits light and other types of radiation. Some of…
(Mint Family) Diagnostic characters Habit: Annual herbs or rarely shrubs. Roots: Tap root Stem: Herbaceous; quadrangular; glandular hairs are present. Leaves: Petiolate; opposite and decussate; simple; exstipulate; Inflorescence: Verticillaster (opposite…
Occurrence: Majority members of this class are freshwater. are found in ponds, lakes, streams, moist rocks and damp plat Some species are marine. Vegetative structure: They have variety of vegetative…
abida
saadia
sidra
sana