How Does Nostoc Reproduce By Fragmentation?
There is no sexual reproduction in Nostoc even though transduction and conjugation have been observed in a few unicellular cyanobacteria.... View Article
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Why Are Species Of Agaricus Cultivated?
Many species of Agaricus are edible, and therefore they are cultivated. The most common species is Agaricus bisporus which is... View Article
Why Are Mushrooms Considered Saprophytic Fungi?
Mushrooms are the advanced members of a fungi group belonging to the class Basidiomycetes. They grow on dead and decaying... View Article
What Are Some Harmful Effects Of Fungi?
Harmful effects of fungi – Spoilage of foodstuffs – many species of Penicillium, Aspergillus etc spoil foodstuffs like pickles, bread,... View Article
What Are The General Characteristics Of Bryophytes?
General characteristics of Bryophytes – The main plant body is a gametophytic thallus which is haploid in nature They are... View Article
What Is Androphore And Gynophore?
The floral parts are inserted on the thalamus. In a few plants like roses, the thalamus grows further into a... View Article
What Are The Types Of Imbricate Aestivation?
In imbricate aestivation one of the petals in the corolla is internal, other external. The remaining petals show one margin... View Article
Describe The Valvate And Twisted Aestivation.
The mode of arrangement of either sepals or petals on the thalamus is called aestivation. Valvate aestivation – when margins... View Article
Does Dehiscence Of Anther Occur Longitudinally Or Transversely?
Microscope mother cells undergo meiosis to form spore tetrads. The microspores of pollen grains get separated from the tetrads. When... View Article
Brief About The Structure Of The Fruit.
A fruit is defined as a fertilized and ripened ovary. The fruit wall is called the pericarp which can be... View Article
Write About Aggregate Fruits.
All the aggregate fruits are developed from multicarpellary apocarpous pistils. Hence, a cluster of fruitlets is produced from a single... View Article
How Are Dry Fruits Classified?
They are classified as follows – I. Dry dehiscent fruits Legume – example: Pisum sativum, Dolichos lab lab Follicle –... View Article
What Is Pome And Pepo?
Pome – is always developed from an inferior, multicarpellary and syncarpous ovary where the massive thalamus becomes an edible part.... View Article
Describe The Ducts Of The Salivary Glands In Cockroaches.
Ducts arising from the glandular portions of each side unite forming a salivary gland duct. The ducts of both sides... View Article
Describe The Peripheral Nervous System Of Cockroaches.
All nerves arising from the nerve ring and ventral nerve cord constitute the peripheral nervous system. A pair of optic,... View Article
Why Is Most Milk Produce Converted Into Milk Products?
Milk is a complete food for infants and constitutes a very important supplementary diet for man. Due to its high... View Article
Albuminous seeds store their reserve food mainly in
A) cotyledons B) endosperm C) perisperm D) hypocotyl Answer:B) endosperm Explanation: Albuminous seeds are endospermic seeds, endosperm persists in the... View Article
Animal vectors are required for pollination in
A) mulberry B) Vallisneria C) maize D) cucumber Answer:D) cucumber Explanation: Animals are required for pollination in cucumber. Cucumber... View Article
Product of sexual reproduction generally generates
A) large biomass B) new genetic combination leading to variation C) prolonged dormancy D) longer viability of seeds. Answer:B) new... View Article
Which one of the following statements is correct regarding pollen?
A) Tapetum nourishes the developing pollen B) Endothecium produces the microspores C) Sporogenous tissue is haploid D) Hard outer layer... View Article
