Type : Physcia – Structure & Reproduction
abidaGeneral structure Physcia is foliose lichen. Physcia is divided into four regions internally. These regions are: 1. Upper cortex: It is present at the upper regions. It is composed of…
LICHENS
General characters:The intimate symbiotic association of fungi and algae is called lichens.Algae get protection and get moisture from fungus.Fungi get nutrition from the algae.The food substances diffuse from algae to…
FUNGAL DISEASES IN PLANTS
RUSTS Causative agent: Puccinia graminh (Basidiomycota) Affected plants: Wheat, barberry Symptoms: Reddish streaks (pustules) appear on the stems and other parts of wheat. These streaks may affect most of the…
Economic Importance of Fungi
(a) Role of fungi in Agriculture or crop production Decomposition and humus formation: Fungi decompose the dead animals and plants. Fungi change them into humus. rums is decomposed organic matter.…
TYPE 3: AGARICUS (Mushrooms)
The members of this genus are commonly called mushrooms. Mushrooms grow on soil. They are abundantly found on soil with decry plant material and moisture. The specie ,4garietts campsites is…
What is a Jackobson’s organ
rubabOlfactory senses are better developed in reptiles than in amphibians. In addition to having more olfactory epithelium, most reptiles (except crocodilians) possess blind-ending pouches that open into the mouth These …
PRIMARY GROWTH IN STEM
sanaPrimary growth takes place by the activity of apical meristematic cells of stem. Primary growth passes through following phases. Phase of Cell division: The numbers of cells are increased by…
Write a note on taste buds
Taste buds are barrel-shaped clusters of chemoreseptor cells called gustatory cells and supporting cells arranged like alternating segments of an orange. Extending from each receptor cell are gustatory hairs that…
TYPE 2: PUCCINIA (Rust)
Occurrence Puccinia is large genus. It has several obligatory parasitic species.tritici is a parasite of wheat. It completes its life cycle in two different hosts: wheat and barely. Thus it…
What is rhodopsin, and how does it functions?
What is rhodopsin, and how does it functions? Ans. Both rods and cones contain light sensitive pigments known as rhodopsins. Each rhodopsin molecule consists of a large protein, opsin, which…