Population growth – Types and Regulations
abidaPopulations are groups of individuals of the same species that occupy a given area at the same time. Each population has •unique attributes (characteristics). Two of the most important attributes…
TROPIC MOVEMENT
sanaThe movements in curvature of whole organ towards or away form the stimuli such as light, gravity and touch are called tropic movement. It has different types. It may be…
PLANT MOVEMENTS
Movements are of universal occurrence in plants. Most of the plants are fixed. They can bend only their parts. It is called curvature movement. The locomotory movement of the animal…
INDIVIDUAL AND POPULATION
ANIMALS AND THEIR ABIOTIC ENVIRONMENT Habitat: All living (biotic) and nonliving (abiotic) characteristics of the a ea in which an animal lives is called habitat. Abiotic characteristics are a ailability…
FACTORS AFFECTING VERNALIZATION
Water and Oxygen Seed need to imbibe 20 10% water. Therefore, dry seed cannot be vernalized. Similarly oxygen is also necessary for vernalization. Oxygen is used during respiration. A germinating…
OBJECTIVE
saadiaOBJECTIVE Multiple Choice Questions MCQs Four options are given, at the end of each statement. You should encircle one option from them. 1. Cambrian period was preset: (a) 300 million …
Mechanism of vernalization
Following views tried to explain the mechanism of vernalization: Concept of Gregory Gregory and coworker were working on cereals. They believed that vernalization process consists of several partial reactions. Cells…
Genetic Engineering or Genetic modification (GM)
rubabThe process of manipulating genes, usually outside the organism's normal reproductive process is called genetic engineering or genetic modification (GM) or gene splicing. It involves the isolation, manipulation and reintroduction…
Vernalization discovery, forms & site
The low temperature treatment given to the seed or plant for stimulating flowering in them is called vernalization. Some seeds required low temperature treatment to break dormancy. Similarly shoot bud…
DEFINITIONS AND KEY POINTS For Seed Dormancy
TERMS DEFINITIONS Seed dormany The physiological inability of a seed to germinate even under favourable condition called seed dormancy. Scarification The seed coat is punctured or mechanically ruptured by rubbing.…