Bacteria Test Questions

Following are bacteria test questions important for test and papers. Give composition or cell wall of bacteria? Ans: The cell walls of most bacteria have a unique macromolecule called peptidoglycan. Its amount is different in different types of bacteria. It is composed of long framework of glycan (glucose) chains. These glycan chains are linked with peptide fragments. The intact cell ...

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Viruses Test Questions

The viruses important questions for papers and tests are as follow What are virus and virion? Ans: Viruses are infectious particles consisting only of the viral genes enclosed in a shell made up of proteins. The infectious complete body of viruses is called virion. Virion is composed of nucleic acid and capsid. Therefore, viruses are generally called nucleocapsid. What are ...

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Plant Diversity Exam Questions

Following are some important plant diversity exam questions. What is diversity? Which factors do cause it? Ans. The presence of variety of plants in the form of different taxas (specie, genera) is called diversity of plant. Different plants have different morphology, physiology, cytology and anatomy. It produces diversity among plants. What is systematic? What does it include? Ans. The study ...

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Classification of Bacteria

The classification of bacteria is determined on the basis of their form, structure, mode of nutrition, the environment they are living in or their habitat. Since bacteria are cosmopolitan and found everywhere on earth. Classification of Bacteria Classification of Bacteria is as follow: Archeobacteria They are the most primitive organisms on the earth. The lack peptidoglycan in their cell wall. ...

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Viral Diseases in Animals and Plants

Virus or viral diseases does not produce symptoms directly in the animals (humans). But it indirectly affects the host. Virus causes different diseases in animal and plants. Some virus stimulates the lysosome of host cell to produce hydrolytic enzymes. These enzymes cause bursting of host cell. These hydrolytic enzymes damage other cells. Sometimes, envelope of the virus is toxic to the ...

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Classification of Viruses

Classification of Viruses is to name and place the virus into different groups or subgroups in phylum Vira. The viruses are placed or classified into a group or sub-phylum on the basis of their different characteristics (Phenotypic Characteristics). Those characteristics are as follow: Phenotypic Characters of Viruses 1. Type of nucleic acid (DNA or RNA) they have. 2. Morphology of ...

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Four Major Periods of Plant Evolution

The fossil record shows that there are four major periods of plant evolution, which took place the history of evolution of earth. Since the first organism formed on earth. But before discussing the periods of evolution let’s discuss the basic concepts of evolution in plants diversity. Basic Concept of Evolution in Plants Diversity Nearly all plants reproduce sexually. Most plants ...

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Characteristics of the 5 Kingdoms

Basically, the Kingdoms of life (The 5 kingdoms) was divided on the basis of two aspects, two points. The first was kingdom Classification System, while the second was Division Classification system. The 5 Kingdoms (Kingdom Classification System) In 1969, Robert H, Whittaker described a system of classification. This classification forms five kingdoms. This basis of classification of Whittaker is: (a) ...

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Taxonomic Hierarchy of Plants

Classification, taxonomic hierarchy and nomenclature of plants are included in plant diversity. The presence of variety of plants in the form of different Taxas (specie, genera) is called diversity of plant. Different plants have different morphology, physiology, cytology and anatomy. It produces diversity among plants. Scope and Classification of Plant Kingdoms The study of kinds and diversity of organisms and the ...

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First Vascular Plants on Earth

Vascular plants first appeared during the Silurian period. They diversified in the Devonian and spread into many different land environments. They have a number of adaptations that allowed them to overcome the limitations of the bryophytes. These include a cuticle resistant to desiccation, and vascular tissues which transport water throughout the organism. In most the sporophyte acts as a separate ...

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