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Yogita Ingle 4 years, 2 months ago
- Theophrastus is known as the father of Botany.
- Aristotle is known as the father of biology and zoology.
Posted by Abhishek Pratap Singh 4 years, 2 months ago
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Tanya Tiwari 4 years, 2 months ago
Posted by Aditee Sharma 4 years, 2 months ago
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Yogita Ingle 4 years, 2 months ago
Thallus refers to the plant body which is not properly differentiated or distinguished into root, stem and leaves. Plants having thallus type of body are called thallophytes. This includes Algae, Bryophytes and Pteridophytes.
Posted by Bharath Guru 4 years, 2 months ago
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Yogita Ingle 4 years, 2 months ago
Lungs are the chief centres of the respiration in humans and other vertebrates. They are located in the thoracic cavity of the chest near the backbone and on either side of the heart. They are the pair of large, spongy organs, mainly involved in the exchange of gases between the blood and the air. Compared to the left lung, the right lung is quite bigger and heavier.
Posted by Amir Rahmani 4 years, 2 months ago
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Posted by Kavin .M 4 years, 2 months ago
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Tanya Tiwari 4 years, 2 months ago
Posted by Abishek Vshari 4 years, 2 months ago
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Tanya Tiwari 4 years, 2 months ago
Yogita Ingle 4 years, 2 months ago
Systematics is the study of diversity and interrelationships between organisms, both extinct and extant. It also deals with classification of living beings. Fields of systematics differ according to various authors. Some authors classify three fields of systemics : Taxonomy, Classification and Phylogeny. According to other authors, these are Numerical Systematics, Biochemical Systematics and Experimental Systematics.
Posted by Diwakar Khandelwal 4 years, 2 months ago
- 5 answers
Diwakar Khandelwal 4 years, 2 months ago
Yogita Ingle 4 years, 2 months ago
Once being differentiated, nerve cells do not divide as they lack mitotic activity.lack mitotic activity indicates that they do not have centrosome.
Posted by Diwakar Khandelwal 4 years, 2 months ago
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Meghna Thapar 4 years, 2 months ago
Chromosome are composed of thin chromatin threads called chromatin fibers. Each species has a definite chromosome number, represented by 2n. Somatic cells contains two copies of each chromosomes, which are identical in morphology, gene content and gene order and they are known as homologous chromosomes.
Posted by Diwakar Khandelwal 4 years, 2 months ago
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Meghna Thapar 4 years, 2 months ago
The transmission of characteristics from parents to offspring is called heredity, and the characteristics that are inherited can be predicted. Reginald Punnett contributed much to the science of genetics when he designed a method of predicting traits as he was studying poultry genetics. Looking more like one parent or the other is dependent on the gene versions each parent has. And which ones happen to get passed down. We have two copies of each of our chromosomes and so have two copies of each of our genes.
Posted by Diwakar Khandelwal 4 years, 2 months ago
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Jagrit Kandhari 4 years, 2 months ago
Meghna Thapar 4 years, 2 months ago
Chromosomes are the rod-shaped ,filamentous bodies present in the nucleus, which become visible during cell division. They are carriers of the gene or unit of heredity. There are four main types of chromosomes: metacentric, submetacentric, acrocentric, and telocentric. Chromosomes are found within the nucleus of most living cells and consist of DNA that is tightly wound into thread-like structures.
Posted by Diwakar Khandelwal 4 years, 2 months ago
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Meghna Thapar 4 years, 2 months ago
Under a microscope, plant cells from the same source will have a uniform size and shape. Beneath a plant cell's cell wall is a cell membrane. An animal cell also contains a cell membrane to keep all the organelles and cytoplasm contained, but it lacks a cell wall. A difference between plant cells and animal cells is that most animal cells are round whereas most plant cells are rectangular. Plant cells have a rigid cell wall that surrounds the cell membrane. Animal cells do not have a cell wall.
Posted by Ravindra Kumar 4 years, 2 months ago
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Yogita Ingle 4 years, 2 months ago
Vegetative characters – roots, stem and leaves and then floral characters inflorescence and flower parts.
Posted by Vaishnavi Singh 4 years, 2 months ago
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Yogita Ingle 4 years, 2 months ago
A plasmid is usually a circular (sometimes linear) piece of double-stranded DNA found in bacteria that is different from bacterium’s chromosome. It carries non-essential genes that can augment a bacterium’s ability to survive in certain circumstances.
For example, plasmids carry genes that enable a bacterium to metabolise a certain type of nutrient otherwise it cannot enable to conjugate. Plasmids are used for a vast variety of experiments from expressing human genes in bacterial cells to DNA sequencing.
Posted by Sonia Rajput 4 years, 2 months ago
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Shreya Rawat 4 years, 2 months ago
Tanya Tiwari 4 years, 2 months ago
Posted by Golu Yadav Yadav 4 years, 2 months ago
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Swayamjit Mohanty 4 years, 2 months ago
Yogita Ingle 4 years, 2 months ago
A substance to which another substance is applied we call it as a substrate. Its definition is different in different sciences. According to biology, it is a medium on which flora, fauna or fungi lives.
Posted by Ayush Kumar Singh Ayush Kumar Singh 4 years, 2 months ago
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Shivali Thakur ? 4 years, 2 months ago
Posted by A.A ?? 4 years, 2 months ago
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Shiva Yadav 4 years, 2 months ago
Yogita Ingle 4 years, 2 months ago
A somatic cell is any cell of the body except sperm and egg cells. Somatic cells are diploid, meaning that they contain two sets of chromosomes, one inherited from each parent. Mutations in somatic cells can affect the individual, but they are not passed on to offspring.
Aimy Kunnel 4 years, 2 months ago
Posted by A.A ?? 4 years, 2 months ago
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Yogita Ingle 4 years, 2 months ago
A somatic cell is any cell of the body except sperm and egg cells. Somatic cells are diploid, meaning that they contain two sets of chromosomes, one inherited from each parent. Mutations in somatic cells can affect the individual, but they are not passed on to offspring.
Posted by Chehak .. 4 years, 2 months ago
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Ayush Kumar Singh Ayush Kumar Singh 4 years, 2 months ago
A.A ?? 4 years, 2 months ago
Posted by Rushikesh Kadam 4 years, 2 months ago
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Yogita Ingle 4 years, 2 months ago
Ribosomes are important for protein production. Together with a structure known as messenger RNA (a type of nucleic acid) ribosomes form a structure known as a polyribosome which is important in protein synthesis.
A.A ?? 4 years, 2 months ago
Posted by Pratiksha Sharma 4 years, 2 months ago
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Aimy Kunnel 4 years, 2 months ago
Yogita Ingle 4 years, 2 months ago
A large variety of plants, animals, and microbes found on earth and they differ in size, shape, colour, habitat, and many other characteristics. So, studying each of them is impossible. Therefore, scientists have devised mechanisms to classify all living organisms on certain rules and principles that allow identification, nomenclature, and finally classification of an organism.
For example, based on presence of three pairs of legs and 2 pairs of wings, an organism is identified as an insect, it will be given a scientific name and then grouped with other similar organisms. Thus, various groups or taxon include organisms based on their similarity and differences.
Therefore, the biological classification helps in revealing the relationship between various organisms. It also helps in making study of organisms easy and organized.
Posted by Jasmeen Kaur 4 years, 2 months ago
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Posted by Rintei Hmar 4 years, 2 months ago
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Yogita Ingle 4 years, 2 months ago
The epidermis is an outer protective covering tissue of plant roots, leaves, and stems of nonwoody plants. It contains closely packed epidermal cells.
Modifications of epidermis of roots, stem and leaves:
- Walls of epidermal cells are covered with a waxy cuticle to minimise water loss and protect against bacteria.
- In roots, certain epidermal cells are modified into root hairs that increase surface area of the root for absorption of water and minerals and help to anchor the plant firmly in place.
- Protective hairs of a different nature are produced by epidermal cells of stems and leaves.
- Epidermal cells may be modified as glands that secrete protective substances of various types.
- In leaves, particularly the lower epidermis, specialized epidermal cells (guard cells) form microscopic pores (stomata) and regulate gas exchange between interior and exterior of a leaf.
The roots, stem and leaves of plants are modified for storage of food or protection to the plant.
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Root modifications |
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Adventitious and prop roots |
E.g. Maize |
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Pneumatophores |
E.g. Mangroves |
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Velamen roots |
E.g. Orchids |
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Fleshy roots |
E.g. Carrot |
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Stem modifications |
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Tendrils |
E.g. Grapes |
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Cladophylls |
E.g. Asparagus |
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Thorns |
E.g. Bougainvillea |
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Storage stems |
E.g. Onion bulbs |
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Runners/Stolons |
E.g. Strawberry |
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Leaf modifications |
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Spines |
E.g. Cacti |
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Bracts |
E.g. Bougainvillea |
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Carnivorous leaves |
E.g. Venus flytrap |
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Tendrils |
E.g. Peas |
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Plantlets |
E.g. Kalanchoe |
Posted by Arnab Kumar Adhvaryyu 4 years, 2 months ago
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Posted by Vaishali ..... 4 years, 2 months ago
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Posted by Aj Kashyap 4 years, 2 months ago
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Posted by B. Rohiith B. Rohiith 4 years, 3 months ago
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Yogita Ingle 4 years, 3 months ago
Any offenses committed against individuals or groups of individuals to harm the reputation or cause physical or mental trauma through electronic means can be defined as Cybercrime. Electronic means can include but are not limited to, the use of modern telecommunication networks such as the Internet (networks including chat rooms, emails, notice boards and groups) and mobile phones (Bluetooth/SMS/MMS).
Posted by Sanjay Kumar 4 years, 3 months ago
- 2 answers
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Xavier Collins 4 years, 2 months ago
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