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Ask QuestionPosted by Supriya Chaubey 6 years, 6 months ago
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Echasana Echasana 6 years, 6 months ago
Posted by Sangeeta Kanojia 6 years, 7 months ago
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Yogita Ingle 6 years, 7 months ago
Lycopodium is commonly known as ‘club moss’ due to their moss like appearance and club shaped strobili. It has about 400 species, which are cosmopolitan in distribution. They are found in colder arctic region as well as in temperate, tropical and sub-tropical regions but they are abundantly found in tropical zones.
Thirty three species of Lycopodium have been reported from India. Mostly it is found growing in moist and shady places which are rich in humus and other organic matters. Some of the common species are L. clavatum, L. phlegmaria, L. cernuum, etc.
Posted by Garima Singh 6 years, 7 months ago
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Yogita Ingle 6 years, 7 months ago
Species is the basic unit of classification that has similar characteristics among the members of the same species
Posted by Himanshi Gupta 6 years, 7 months ago
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Sia ? 6 years, 7 months ago
Connective tissue has three main components:
- Ground substance
- Fibers
- Cells
Together the ground substance and fibers make up the extracellular matrix. The composition of these three elements vary tremendously from one organ to the other. This offers great diversity in the types of connective tissue.
Structural elements of connective tissue: Connective tissues consist of three parts: cells suspended in a ground substance or matrix; and most have fibers running through it.
Ground substance is a clear, colorless, viscous fluid that fills the space between the cells and fibers. It is composed of proteoglycans and cell adhesion proteins that allow the connective tissue to act as glue for the cells to attach to the matrix. The ground substance functions as a molecular sieve for substances to travel between blood capillaries and cells.
Posted by Hardik Sachdeva 6 years, 7 months ago
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Shraddha Tiwari 6 years, 7 months ago
Posted by Gurvinder Kaur 6 years, 7 months ago
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Sia ? 6 years, 7 months ago
Leech, (subclass Hirudinea), any of about 650 species of segmented worms (phylum Annelida) characterized by a small sucker, which contains the mouth, at the anterior end of the body and a large sucker located at the posterior end.
Posted by Gurvinder Kaur 6 years, 7 months ago
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Posted by Ayush Kumar 6 years, 7 months ago
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Sandeep Chaudhary 6 years, 6 months ago
Yogita Ingle 6 years, 7 months ago
(1) Cytology: (G.k. kyios = cell ; logas = study) is the branch of biology which comprises the study of cell structure and function.
(2) Cell is the structural and functional unit of all living beings.
Prokaryotic cells : Cells which lack a well defined nucleus and membrane bound cell organelles. e.g., bacteria, cyanobacteria, mycoplasma.
Eukaryotic cells : Cells which have a well defined nucleus and membrane bound cell organelles. e.g., all protists, plants, animals and fungi cells.
Posted by Richa Sharma 6 years, 7 months ago
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Tripti Rawat 6 years, 7 months ago
the classification of something, especially organisms.
"the taxonomy of these fossils"
a scheme of classification.
Taxa {plural}, taxon +singular}
any group or rank in a biological classification
Posted by Vikrant Narwal 6 years, 7 months ago
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Sia ? 6 years, 7 months ago
The gastrointestinal tract (GIT) arises initially during the process of gastrulation from the endoderm of the trilaminar embryo (week 3) and extends from the buccopharyngeal membrane to the cloacal membrane. The tract and associated organs later have contributions from all the germ cell layers.
While crown formation is accomplished during embryonic development, tooth root formation occurs in mice molar teeth at postnatal stages and lasts for up to three weeks. During root formation, cemento blasts are formed from the mesenchymal tooth compartment and secrete cementum, which surrounds the forming tooth root.
As part of embryonic development, the pancreas forms as two buds from the fore gut, an embryonic tube that is a precursor to the gastrointestinal tract. It is therefore of endodermal origin. Pancreatic development begins with the formation of a dorsal and ventral pancreatic bud.
Posted by Vaani Rawat 6 years, 7 months ago
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Posted by Deep 22 6 years, 7 months ago
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Yogita Ingle 6 years, 7 months ago
Mannitol is used as the reserve food material in the Phaeophyceae group or Brown algae.
Posted by Mana Swini 6 years, 7 months ago
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Mana Swini 6 years, 7 months ago
Sia ? 6 years, 7 months ago
The area for free movement of wild animals is reduced which retard reproductive capacity of certain wild animals like rhino, tiger, bison, etc. This is one of the reasons why the wild animals in the zoo rarely reproduce.
Posted by Mana Swini 6 years, 7 months ago
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Yogita Ingle 6 years, 7 months ago
Herbarium is “a collection of plant specimens which have been dried and pressed and arranged in the sequence of an accepted classifications”. It forms a store house for future use. The preparation of Herbarium involves following steps :
(1) Collection of Specimens : It is a field work. For collection one has to get information about the area, habitat, season and the time of collection. There is a requirement of digger for digging roots, scissors for cutting twigs, knife for woody twigs and a pole with a hook for collection.
(2) Drying and Pressing : After collection, the plants are dried up by keeping them between the folds of old newspapers. The plants, after (hying, are pressed up by a set of two broads straps.
(3) Mounting : The dried specimens are pasted on the herbarium sheets of standard size (29 X 41 cm). The specimens are fixed on the sheets by applying glue or adhesive.
The specimens are sprayed with fungicides like 01% solution of mercuric chloride and pesticides like DDT, naphthalene to check fungal growth and insects infections.
(4) Labelling : Labelling should be done with mounting. It should bear the botanical name, family, locality, data of collection with the habit of the plant specimen. The name of the collector or the person should also be given.
(5) Storage : The sheets are arranged according to classification. They are stored in disinfected metallic cupboards. The information about the collected specimens-is compiled and published in the form of a book.
Posted by Richa Sharma 6 years, 7 months ago
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Mana Swini 6 years, 7 months ago
Amit Shukla 6 years, 7 months ago
Mana Swini 6 years, 7 months ago
Amit Shukla 6 years, 7 months ago
Mana Swini 6 years, 7 months ago
Posted by Ayush Kumar 6 years, 7 months ago
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Sia ? 6 years, 7 months ago
Posted by Supriya Chaubey 6 years, 7 months ago
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Posted by Supriya Chaubey 6 years, 7 months ago
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Posted by Muskan Khan Khan 6 years, 7 months ago
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Amit Shukla 6 years, 7 months ago
Posted by Muskan Khan Khan 6 years, 7 months ago
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Posted by Ayush Kumar 6 years, 7 months ago
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Sia ? 6 years, 7 months ago
Posted by Ayush Kumar 6 years, 7 months ago
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Posted by Aditya Saha? 6 years, 7 months ago
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Farhat Shaikh Shaikh 6 years, 7 months ago
Yogita Ingle 6 years, 7 months ago
Viruses are non-living features intermediate between non-living and living organisms. On the basis of characters, such as non-cellular organization, inactivity outside the host organism, lack of respiration and cellular metabolism, these are caused non-living. Moreover, similar to non-living objects viruses can be crystallized and precipitated. Living Feature Similar to living beings, they possess genetic material (DNA or RNA), property of mutation, irritability, can grow and multiply inside the host cell. They are intracellular obligate parasites and attack specific hosts. Thus, keeping these points in mind, it is quite difficult to ascertain whether viruses are living or non-living.
Posted by Nihira Nihira 6 years, 7 months ago
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Farhat Shaikh Shaikh 6 years, 7 months ago
Posted by Sadhana Raheza 6 years, 7 months ago
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Posted by Neharika Rai 6 years, 7 months ago
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Ananya Bhimsaria 6 years, 7 months ago
Posted by James Bhatti 6 years, 7 months ago
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Yogita Ingle 6 years, 7 months ago
- They have a long and segmented body.
- Annelids are bilaterally symmetrical.
- They are triploblastic.
- Also, they exhibit organ system grade of organisation, showing organ differentiation.
- The body is covered with a thin cuticle.
- They are coelomate. A body cavity or coelom is present.
- Annelids live in moist environments, moist soil, freshwater and marine water.
- They have parapodia and chitinous setae, used for locomotion.
- Their body appears red due to the presence of haemoglobin.
- Excretory and nervous systems are present.
- The digestive system is complete and developed.
Posted by Geetanshi Gangwar 6 years, 7 months ago
- 6 answers
Ananya Bhimsaria 6 years, 7 months ago
Posted by Poja Dabas 6 years, 7 months ago
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Tannu Tannu 6 years, 6 months ago
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