General Q&A for Class 12 · Page 33
5,215 free answers in General for Class 12 students, across CBSE, ICSE and State boards.
Question & Answer
Questions
- GeneralClass 12All
What is biological warfare?
Biological weapons spread pathogens or toxins that can injure or kill people, animals, or plants. They typically have two components: a weaponized agent and a delivery system. Biological weapons can be used for the contamination of livestock or agricultural products to cause food shortages and economic loss, the creation of environmental catastrophes, the introduction of widespread illness, fear, and mistrust among the public, in addition to strategic or tactical military applications
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What is a biological hazard?
Bacteria, viruses, parasites, and moulds or fungi are examples of biological health risks. When they come into touch with skin, are eaten, or are inhaled, they can be harmful to human health. They have the potential to spread diseases such parasite infections, tetanus, lung infections, and food poisoning. In order to monitor and manage biological dangers that are spread through water, food, or the air, we offer our expertise and resources. Any workplace is susceptible to biological risk
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What is biological control?
Biological Control Traditionally was an approach for integrated pest management which includes biological control. It is characterised as the control of pest populations by natural enemies and usually entails a proactive human role. Remember that all bug species are repressed without any human involvement by naturally occurring organisms and environmental circumstances. Oftentimes, this is referred to as natural control. Although the biological control of insects is the focus of this manual,
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What is a system in biology?
What exactly is a "system"? The Latin word "systema," which depicts the relationship between several working elements or units, is where the word "system" originates. There are numerous ways to define a system; however, a typical definition states that a system is an entity made up of grouped components joined together in accordance with a predetermined plan to produce a particular result. A system can have physical, coordinated, or multi-structured components. What is the easiest way to defi
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What is pedigree in biology?
A pedigree is a diagram which shows how a trait or medical condition is passed down through a family's generations, as it relates to genetics. The pedigree specifically demonstrates the ties between family members and, when information is available, identifies which individuals possess the desired trait(s). An example of a pedigree is a family tree. It illustrates the connections between the members of a family. We can also point out who possesses a specific trait or genetic disorder.</
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What is metamerism in biology
Metamerism is a phenomenon that is seen in some phyla like Annelida. It is a biological occurrence in which growth occurs by forming linear and fundamentally similar structures. Animals that possess such metamerism are called metamerically segmented. In animals, these metamers are called somites, whereas in plants it called phytomers. These metamers or somites are formed based on identical structures or fundamental organisation. First evidence of the metamerism: It was first o
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What is parasitism in biology
Parasitism means"one who eats at another's table," which is where the word parasite originates. A relationship between two living species in which one organism benefits at the expense of the other is known as parasitism. The parasite is the creature that benefits and the host are the organisms that suffer or are damaged. Types of Parasitism: Parasites on the basis of life cycle can be of two types. Obligate parasite: The term "obligate parasite" refers to parasites that must l
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What is order in biology
The order used in biological classification is a taxonomic rank used in the classification of organisms and acknowledged by the naming rules. The term "order" refers to a taxonomic rank that falls between "class" and "family" in biology. Between class and order is the superorder. Depending on the applicable |Nomenclature Code, specifics of formal nomenclature may vary. Except for those of mammals and invertebrates, most orders' scientific names end with the Latin suffix -(i)formes, wh
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What is lignin in biology
All vascular plants possess lignin in their cells, cell walls, and intercellular spaces. Lignin is what provides food its fibre content, giving vegetables their delicious crunch and giving trees their woody appearance. The word "lignin" is very self-explanatory since it derives from the Latin word for "wood". Lignin helps plants stay upright by strengthening the cell walls and preventing them from collapsing, which is essential for the transportation of liquids throughout the plant (just thin
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Immunity in Biology
Immunity refers to the body's capacity to fend off pathogen invasion. People are constantly exposed to pathogens, which are foreign agents that cause disease. Examples of these agents include bacteria and viruses. Pathogens have antigens attached to their surfaces, which cause the immune system to respond. The body's defence mechanism against antigens and for bodily protection is the immunological response. Immunity can be of following types: Innate immunity, passive immunity, and acq
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What is histology in biology
Histology is the study of microscopic anatomy in which we study the structure of cells and tissues; therefore, it is also called microanatomy. In histology, advanced techniques are used to observe, analyze and identify the tissue and its structure. Microscopy used in this respect is light microscopy and electron microscopy. The basic procedure in histology is as follows: Staining is a simple process that starts with washing the material with it so that stain gets stuck t
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Duct in Biology
In physiology and anatomy, a duct is a tube-like structure or a channel that transmits secretion from the endocrine organs to the place of its activity or requirement. Ducts travel from the acinus sites that generate secretions. Ducts form a system that can be of three types: Intercalated duct: It is a part of the exocrine gland that leads directly from acinus to a striated duct. This intercalated duct forms a part of the interlobular duct. This duct has thinnest epithelium an
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What is endocytosis biology
Endocytosis is a cellular process that brings any substances from the outer environment inside the cell. Through this process, a cell procures the nutrients and essential elements required for its growth and multiplication from the external environment. A cell also engulfed the foreign harmful substances and further neutralized them. In endocytosis, the cell membrane folds itself so that they can capture the material to be engulfed in their form of vesicles. Later this vesicular structure pin
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What is osmotic pressure in biology
In any system, osmotic pressure is the amount of force applied to the semipermeable membrane in order to stop water from entering through a semipermeable membrane. Because the cell membrane is selective toward many of the solutes found in living creatures, osmotic pressure is crucial to biology. A cell shrinks and loses its turgidity when it is submerged in a hypertonic solution because water really leaks from the cell into the surrounding solution. Antimicrobial control is ac
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What is computational biology
Computational biology is a field of biology that uses computers to analyse the collected database using mathematics and statistics. Information may be collected from different sources such as molecular research studies, environmental research, clinical trials, tissue specimens, and scientific journals. This computational biology is also known as bioinformatics. Bioinformatics includes a combination of different sciences like chemistry, biology, physics, mathematics, statistics, inform
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Osmoregulation in Biology
The act of maintaining the water and salt balance (osmotic balance) across semipermeable membranes in the body fluids, which are made up of water as well as electrolytes and non-electrolytes, is known as osmoregulation. An electrolyte is a solute that separates into ions when dissolved in water. In contrast, a non-electrolyte does not split into ions during the dissolving of water. The osmotic equilibrium is influenced by electrolytes and nonelectrolytes alike. When a cell is im
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Eutrophication in Biology
The term "eutrophication" is broad and refers to a significant issue in the nation's estuaries. The process of eutrophication, which happens when the environment becomes enriched with nutrients, increases the quantity of aquatic plant and algae development in estuaries and coastal waters, which causes harmful algal blooms, dead zones, and fish kills. Excess algae and vigorous growth of aquatic plants is the first sign of eutrophication, which then triggers a series of events in the ec
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What is ecology in biology
Ecology is the branch of biological science that shows how organisms interact with their environment and other organisms. Each organism has complex interactions with members of its species as well as members of other species. There are several selective pressures on organisms due to these complex relationships. Together, the pressures result in natural selection, which drives the evolution of species populations. Ecology is the study of forces, what causes them, and the intricate interactions
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What is developmental biology
Developmental biology is the branch of biology that studies how various interrelated processes result in the varied shapes, sizes, and structural characteristics of an organism as they develop from embryo to adult, or more broadly, as they do during a life cycle. Molecular biology, physiology, cell biology, anatomy, cancer research, neuroscience, immunology, ecology, and evolutionary biology are all integrated within the rapidly expanding and interesting area of developmental biology.
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What is cork in biology
The cork cambium, also known as cambia or cambiums, is a tissue that makes up the epidermis in many vascular plants. Between the cork and the major phloem, it is one of the numerous layers of bark. A lateral meristem called the cork cambium is in charge of the secondary growth that takes the place of the epidermis in roots and stems. It is present in several monocots, gymnosperms, and many herbaceous dicots (monocots usually lack secondary growth). It is a part of the plant's meristem, a grou