Uncategorized

Seed Dispersal – Types of Dispersion, and Dispersal Mechanism

Seed Dispersal

Seed Dispersal – Dispersion Mechanism, Methods of Dispersion, What is Wind Dispersal, Explain Animal Dispersal and Seed Dispersal by Water, Also Describe Plant Dispersal or Self Dispersal Seed dispersal and fruit dispersal both of them refers to the carrying of these particular structures to places away from the plants producing them to other wider regions. Plants have adopted this dispersal mechanism because ...

Read More »

Self Pollination – Types of Self Pollination, Self Pollinating Plants List

Self Pollination - Types of Self Pollination

Self Pollination – Types of Self Pollination, Define Homogamy (Autogamy Pollination), Cleistogamy, Geocarpy Self pollination is defined as the transfer of mature pollen grains from the anther of flower to stigma of same flower or to that of another flower of the same plant. So, this whole process is termed as Self pollination or Autogamy (auto – self, Gamos – marriage). ...

Read More »

Chromosomal Inversion – Types of Inversions, Describe Inversion Loop

Chromosomal Inversion

Chromosomal Inversion – Describe Types of Inversion, Inversion Loop and Explain The Role of Inversion in Evolution Chromosomal inversion are also called by different names (genetic inversion, chromosome inversion or inversion mutation). The Inversions are chromosomal mutations that concludes a segment of chromosome which is turned around 180o and is reinserted into the chromosome. It does not involve a loss ...

Read More »

Biology Terms and Definitions

Terms of Biology Ecology: Study of organisms in relation to environment is called ecology. Physiology: Study of functions of different parts of body is called physiology. Histology: Study of tissues with the help of microscope is called histology. Genetics: Study of hereditary characters and their inheritance is called genetics. Zoogeography: Study of geographical distribution of animals on earth is called ...

Read More »

Important Point of The Chapter bacteria And Viruses

ADDITIONAL RELATED READINGS Taxonomy is the branch of biology which deals with the naming and classification of individuals. The arrangement of organisms into systematic groups is called as classification. More than 1.5 million species of animals and more than 0.5 million species of plants are known. All organisms are related to one another at some point in their evolutionary histories. ...

Read More »

Classification of virus Notes

CLASSIFICATION OF VIRUSES Different types of plant, animal and bacterial viruses are classified on the basis of morphology, cover and nucleic acid properties. Genetic Material: The genetic material may be DNA or RNA Cover: The genetic material may be naked, enveloped or complex. Morphology: On the basis of morphology viruses are classified into rod shaped (T.M.V), spherical (poliovirus), tadpole like ...

Read More »

LIFE CYCLE OF BACTERIOPHAGES ( LYTIC AND LYSOGENIC CYCLE)

The bacteriophage replicates only inside the bacterial cell. There are many steps in replication. Attachment (Adsorption) of Phage to the Host Cell: First of all the bacteriophage attaches to the bacterial cell at receptor site. The receptor sites are present on the cell wall of bacterium. During attachment, week chemical union occurs between virion and the receptor site. Penetration: In ...

Read More »

Diseases Caused by Viruses

DISEASES CAUSED BY VIRUSES Small Pox: Virus: It is caused by poxviruses. This virus is DNAenveloped. History: This disease occurred as epidemic in China in 12th century B.C. Until the early 20th century, it was common. Symptoms / Effects: This disease results in the formation of raisedfluid-filledvesicles on the body. These become pustules later on and form pitted scars, the ...

Read More »

Structure and Shape of bacteriophage

These have two shapes (structural forms): Cubical: These are regular solid or icosahedral (having 20 triangular faces). Helical Symmetry: They are rod shaped. Many phages consist of head and tail. The heads are polyhedral but tails are rod shaped. STRUCTURE OF BACTERIOPHAGE Bacteriophage meaning bacteria eater. Earlier workers studied few phages that infect Escherichia coli. Of these the best phages ...

Read More »
Distributed by name369.com