Animal Kingdom-Quick Revision

Animal Kingdom online free test NEET, AIIMS,JIPMER, CSIR,GATE,DBT,ICMR

The animal kingdom is characterized by heterotrophic eukaryotic organisms that are multicellular and their cell lack cell wall. In animals, certain fundamental features are common to various individuals, which forms the basis of their classification. The level of organization also called grades of arrangement cellular level(Poriferans), tissue level (coelenterates and ctenophores), tissue organ level (Platyhelminthes) […]

Plant Kingdom-Quick Revision

Plant Kingdom

In the plant kingdom, plants are classified into various divisions and subdivisions based on their similarities and dissimilarities. The branch of science, dealing with classification of plants is called Plants taxonomy. The study of plants is called Phytology. Kingdom-Plantae is divided into two subkingdoms, i.e. Cryptogamae (having conspicuous reproductive structures) and Phanerogammae (having visible reproductive structures). Cryptogamae […]

Biological Classification – Quick Revision

Biological Classification

Classification is the scientific procedure of arrangement of living organism into groups. It is done on the basis of their similarities and dissimilarities and placing the groups in a hierarchy of categories. The first pioneer work on biological classification was done by Linnaeus. He classified living organisms into the two kingdoms, i.e Plantae and Animalia. […]

Nucleocytoplasmic index – Syncytium and Coenocytic condition – Nucleus

Nucleocytoplasmic Index

 Key concept –Nucleus Discovery, Shape, and Size, Nucleocytoplasmic index, Nucleus & cytoplasmic proportion, why cell divide, Syncytium, and Coenocytic condition.   Discovery of Nucleus Robert Brown discovered nucleus in the year 1831. He discovered nucleus in the epidermal cell of the root of the orchid plant and given the term nucleus. According to him, the nucleus is […]

Biotechnology: Principles and Processes-Quick Revision

Basic biology revision-neet, aiims- biotechnology

Biotechnology Biotechnology is the integration of natural science and organisms, cells, parts thereof, and molecular analogs for product and services Genetic engineering is the process of genetic material by the man in vitro for the benefit of mankind. ⇒ Quick Revision – Basic Biology    Recombinant DNA Technology (RDT) Restriction enzymes have the ability to recognize and […]

Human Reproduction – Quick Revision

Quick Revision-human reproduction-NEET, AIIMS, JIPMER,CSIR-placenta

1.Male Reproductive System The scrotum remains connected with the abdomen or pelvic cavity by the inguinal canals. The scrotum is homologous to the labia majora in females. Cremaster muscles and dortas muscles of the scrotal sac help in the positioning of testes. They also help in maintaining the temperature of the testis(2-3 degree lower than […]

Sexual Reproduction in flowering plants Quick Revision

Reproduction in flowering plant -1 important points from previous year exam papers neet,aiims

The sexual reproduction in plants first described by R. Camerarius (1964). » Quick Revision start Page  Male gametophyte – Pollen grain Female gametophyte – Embryo sac 1.Pollen grain formation The wall of microsporangia consists of four layers:- Epidermis Endothecium It is made up of radially elongated cells and helps in dehiscence of anthers. Middle layer […]

The Living World – Quick Revision

Important Branches of Biology This is a collection of important branches of biology asked in various exams. ⇒ Quick Revision – Basic Biology  Acarology –  The study of ticks and mites. Agrostology – Study of grasses. Anthology (Bessey) – Study of flowers and flowering plants. Anthropology – Study of related to origin, development, and culture of […]

Xerophytes – Important Characteristics and Examples

Xerophytes examples and characteristics

some important morphological characteristics of xerophytes are : The root system is well developed extensive, penetrating very deep. Root hairs and root caps are very well developed. The leaves are reduced in area to check transpiration (Casuarina). The leaves may be modified into phyllodes ( Acacia melanoxylon) or succulent (Aloe, Agave, Yucca). The leaves show various […]

Hydrophytes – Important Characteristics and Examples

Characteristics and Examples of Hydrophytes

Some morphological character  of hydrophytes: Roots may be absent (Wolffia, Utricularia) or poorly developed (Hydrilla). Roots, if present, are mostly concerned with Anchorage (Ranunculus). Root caps are replaced by toot-pockets (Eichhornia, Pistia) In some cases floating roots may develop in addition to normal roots  (Jussiaea). The submerged parts are generally surrounded by mucilage for protection. The […]