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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 2401. |
What is "diatomaceous earth"? |
| Answer» The cell wall is made of silica. Due to the siliceous nature of the cell wall, it is known as diatomaceous earth. This diatomaceous earth is a whitish, soft, chemically inert, highly absorbant and fire proof substance. It is used in filtration of oils, sugars, and for other industrial purposes. | |
| 2402. |
Which school is best ? JNV or any other public school. |
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Answer» Okk Actually from 6th standard I am studying in jnv. Ap 9th me kon se school me padhte the .... |
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| 2403. |
Cholorophyll is present in |
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Answer» Sorry Chlorophyll is present in cell and chloroplast is present in chlorophyll Chloroplast Chloroplast Chloroplast Chloroplast... |
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| 2404. |
What is biology ??????? |
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Answer» The word biology is derived from the greek words /bios/ meaning /life/ and /logos/ meaning /study/ and is defined as the science of life and living organisms. An organism is a living entity consisting of one cell e.g. bacteria, or several cells e.g. animals, plants and fungi. The branch of science who deals with the Study of living organisms is called biology. Branch of science |
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| 2405. |
Physical is compulsory or optional |
| Answer» Compulsory | |
| 2406. |
How is a herbarium prepared and what information does it contain? |
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Answer» Herbarium is the collection of plant specimens arranged in the sequence of an accepted calcification. You should search it on Google |
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| 2407. |
DNA change can be beneficial to some organism.illustrate this statement with example. |
| Answer» Organisms\xa0acquire\xa0mutations\xa0throughout their lives. These\xa0mutations\xa0are changes to their genetic code, or DNA. DNA is the molecule that contains an\xa0organism\'s\xa0genetic information and codes for specific physical characteristics. However, on occasion, a\xa0mutation\xa0occurs that is\xa0beneficial\xa0to an\xa0organism.\xa0These\xa0variations\xa0often alter gene activity or protein function, which can introduce different traits in an\xa0organism. If a trait is advantageous and helps the individual survive and reproduce, the genetic\xa0variation\xa0is more likely to be passed to the next generation (a process known as natural selection). | |
| 2408. |
What is anthropocentric? |
| Answer» Regarding humankind as the central or most important element of existence | |
| 2409. |
Notes of 2nd chapter Can you send me |
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Answer» Yes u can easily download the PDF notes of any chapter from myCBSEguide app. Notes of 2 nd chapter biology you can get in myCBSEguide app |
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| 2410. |
What is the easiest way to study names of bacteria without forgetting ?? |
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Answer» The easiest way is u should not study Just divide the entire name in 2-3parts as per your requirement and mug it .It\'s so simple. U should try it. |
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| 2411. |
Name two mammals which lay eggs |
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Answer» Platypus and echidna Platypus and ekidna |
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| 2412. |
Why terristal animal are ureotelic or ureocotelic, not ammonotelic? |
| Answer» Terrestrial animals are either ureotelic or uricotelic, and not ammonotelic. This is because of the following two main reasons:(a) Ammonia is highly toxic in nature. Therefore, it needs to be converted into a less toxic form such as urea or uric acid.(b) Terrestrial animals need to conserve water. Since ammonia is soluble in water, it cannot be eliminated continuously. Hence, it is converted into urea or uric acid. These forms are less toxic and also insoluble in water. This helps terrestrial animals conserve water. | |
| 2413. |
What is Emphysema in easy words? |
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Answer» Thanks A condition in which the air sacs of the lungs are damaged and enlarged, causing breathingless. Chronic disorder in which alveolar wall damaged due to which respiratory surface decreased .One of the major cause is cigarette smoking |
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| 2414. |
10 th ka result kaisa aayega? |
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Answer» Its really depend on us hows the paper was going so the result will be your performance I am from JNV , My result will must be outstanding. Its all depends on you |
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| 2415. |
What is Chemotaxonomy |
| Answer» The method of biological classification based on similarities in the structure of certain compounds among the organisms being classified is called chemotaxonomy. | |
| 2416. |
What is living.. |
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Answer» Which show consciousness , can reproduce , can grow internally , metabolosm will be found .The definig feature of life form is cellular organisation and consciousnesa. Any thing which shows internal growth from cells and also carrying out metabolic activities in it, Said to be living. |
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| 2417. |
Draw and explain general structure of amino acid |
| Answer» Amino acids\xa0are molecules used to build proteins. All\xa0amino acids\xa0have a central carbon atom surrounded by a hydrogen atom, a carboxyl group (COOH), an\xa0amino\xa0group (NH2), and an R-group.\xa0An\xa0amino acid\xa0is a carboxylic\xa0acid-containing an aliphatic primary\xa0amino\xa0group in the α position to the carboxyl group and with a characteristic stereochemistry. Proteins are biosynthesized from 20\xa0amino acids\xa0in a system involving strict genetic control. Thus,\xa0amino acids\xa0are the\xa0basic\xa0unit of proteins. The\xa0general\xa0linear\xa0formula of\xa0an\xa0amino acid\xa0is R-CH(NH2)-COOH. The 20 common\xa0amino acids\xa0are grouped in classes according to their side chains: Click here for IMGT classes of the 20 common\xa0amino acids\xa0\'Physicochemical\' properties.\xa0Twenty Amino acids\xa0can be grouped according to the characteristics of the side chains as follows: Aliphatic – alanine, glycine, isoleucine, leucine, proline, valine. Aromatic – phenylalanine, tryptophan, tyrosine. Acidic – aspartic\xa0acid, glutamic\xa0acid. | |
| 2418. |
Reproductive cycle of angiosperms |
| Answer» In angiosperms, flower is the reproductive organ of the plant. Stamen, the male reproductive part of flower, is made up of anther and filament. Carpel is the female reproductive part and is composed of stigma, style and ovary.\xa0The flower may be unisexual that is, it contains either stamens or carpels or bisexual which contains both stamens and carpels. Stamen produces pollen grains that are yellowish in colour. The ovary contains ovules and each ovule has an egg cell. When a pollen grain falls on the stigma of the carpel, it bursts open and grows into a pollen tube downwards through the style towards the female gamete in the ovary. A male gamete moves down the pollen tube and enters the ovule in the ovary. The tip of the pollen tube bursts open and male gamete comes out of the pollen tube which combines with the nucleus of the female gamete present in the ovule to form a fertilised egg called zygote.\xa0The pollen needs to be transferred from the stamen to the stigma. The transfer of pollen grains from the anther of a stamen to the stigma of a carpel is called pollination.If this transfer of pollen occurs in the same flower, it is referred to as self-pollination but if the pollen is transferred from one flower to another, it is known as cross-pollination. The process of pollination is achieved by agents like wind, water or animals. After the pollen lands on a suitable stigma, it has to reach the female germ-cells which are in the ovary. For this, a tube grows out of the pollen grain and travels through the style to reach the ovary. The fertilised egg divides several times to form an embryo within the ovule which develops a tough coat around it and is gradually converted into a seed. The ovary of the flower develops and becomes a fruit with seeds inside it. | |
| 2419. |
What is museum |
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Answer» They have c9llections of preserved plants and animals specimens for study and reference Museumd have collections of preserved plants and animals specimens for study and reference Where historical things are kept |
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| 2420. |
Cellular organisation class 11 as a defining feature |
| Answer» Definig feature of living | |
| 2421. |
Define symmetry antd their types |
| Answer» There are two types of symmetry - bilateral, radial | |
| 2422. |
How unicellular organisms can maintain separate organisms? |
| Answer» A\xa0unicellular organism\xa0is an\xa0organism\xa0that consists of a single cell. This means all life processes, such as reproduction, feeding, digestion, and excretion, occur in one cell. Amoebas, bacteria, and plankton are just some types of\xa0unicellular organisms. All\xa0single-celled organisms\xa0contain everything they need to\xa0survive\xa0within their one cell. These cells are able to get energy from complex molecules, to move, and to sense their environment. The ability to perform these and other functions is part of their organization. Living things increase in size. | |
| 2423. |
Period of evolution |
| Answer» Human evolution is the lengthy process of change by which people originated from apelike ancestors. Scientific evidence shows that the physical and behavioral traits shared by all people originated from apelike ancestors and evolved over a period of approximately\xa0six million years.\xa0The earliest known\xa0life-forms on\xa0Earth\xa0are putative fossilized microorganisms, found in hydrothermal vent precipitates, that may have lived as early as 4.28 Gya, relatively soon after the oceans formed 4.41 Gya, and not long after the formation of the\xa0Earth\xa04.54 Gya. | |
| 2424. |
What are nucleotides |
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Answer» Hi who are you Yogita IngleHow you know all answers Nucleotides are small complex molecules made of:(1) Njicleotide : Each nucleotide consist of 3 units - a nitrogenous base, a pentose sugar and phosphate group.(2) Nitrogenous base: Nitrogenous base are the purine (adenine or guanine) or pyrimidine (thymine, cytosine or uracil).(3) The nucleotides are mono or di or triphosphates of nucleosides, e.g., Adenosine monophosphate (AMP), Adenosine diphosphate (ADP) and Adenosine triphosphate (ATP).\xa0 |
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| 2425. |
What is the basis of modern classification? |
| Answer» Since it is nearly impossible to study all the living organisms , it is necessary to devise some means to make this possible . so, on this basis modern classification is made up.. and CLASSIFICATION - classification is the process by which anything is grouped into convenient categories based on some easily observable characters.For example , we can recognize groups such as plants or animals . | |
| 2426. |
What is lucanae |
| Answer» Lacuna is a Latin word derived from lacus meaning lake. Thus, in biology, it is a term pertaining to a small depression or cavity and supposedly containing a nucleate cell. In histology or anatomy, lacuna (plural: lacunae) refers to the small cavity in the substance of the bone containing an osteocyte.\xa0In histology, a lacuna is a small space containing an osteocyte in bone or chondrocyte in cartilage. | |
| 2427. |
Define totipotency? |
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Answer» Ability of the cells by which they can produce new entire organism e.g planeria or it can produce new cutted body part e.g tail of lizard. This ability is known as totipotency. The stage of growth in which a living cell capable to form complete organism Totipotency is the ability of living cells to form the whole organism unless and until they have become extremely specialized |
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| 2428. |
Discuss the salient features of viruses with the help of diagram? |
| Answer» Obligate intracellular parasite composed of: Nucleic acid - either DNA or RNAProtein coat is present.Single type of nucleic acid - DNA or RNA Protein coat, or capsid.some have envelopes.Multiply inside of living cells using the host cell machinery.Direct the synthesis of structures to transfer viral nucleic acid to other cells.\xa0 | |
| 2429. |
Explain sexual reproduction in bacteria? |
| Answer» Sexual Reproduction in Bacteria is usually carried out in three ways:\tTransformation – In this process, the DNA from the capsulated bacteria is transferred into a non-capsulated bacteria.\tTransduction – In this process, the DNA is transferred from one bacterial cell into another bacterial cell with the help of a bacteriophage. This process is known to occur in several bacterial species such as Escherichia, Micrococcus, Salmonella, etc.\tConjugation – It is a process in which the genetic material of a bacterial cell of a particular strain is transferred from a donor or male into that of another bacterial cell recipient or female of a different strain. The donor cells are known to possess a *** factor or F factor and the recipient cell does not have this factor and hence it is described as F- strain. | |
| 2430. |
Life cycle of angiosperm ( diagrammatic ) |
| Answer» In flowering plants, the\xa0gametophyte\xa0generation takes place in a flower, which forms on the mature sporophyte plant. Each male\xa0gametophyte\xa0is just a few cells inside a grain of pollen. Each female\xa0gametophyte\xa0produces an egg inside an ovule.\xa0The adult, or sporophyte, phase is the main phase of an\xa0angiosperm\'s life cycle. ... Double fertilization is a process unique to\xa0angiosperms. The ovule, sheltered within the ovary of the carpel, contains the megasporangium protected by two layers of integuments and the ovary wall. | |
| 2431. |
Give difference between species and taxon?? |
| Answer» \tSpecies represents the basic taxonomic category while the taxon represents any level of taxonomic category.\tSpecies is always monophyletic while a taxon may be monophyletic or polyphyletic.\tSpecies, being a rank, is an abstract term while a taxon represents a group of various living beings. | |
| 2432. |
The main salient features phylum ctenophota |
| Answer» Bioluminesceneious | |
| 2433. |
Whai is difference between segmentation and metamerism? |
| Answer» \xa0In animals, metamerism is defined as a mesodermal event resulting in serial repetition of unit subdivisions of ectoderm and mesoderm products. Endoderm is not involved in metamerism. Segmentation is not the same concept as metamerism. Segmentation can be confined only to ectodermally derived tissue, e.g., in the Cestoda tapeworms. Metamerism is far more important biologically since it results in metameres, also called somites, that play a critical role in advanced locomotion. | |
| 2434. |
Define the term "Diversity"? |
| Answer» Diversity means wide variety of something...., | |
| 2435. |
What do you mean by ganglia |
| Answer» Ganglia is a mass of nerve tissue or a group of nerve cell bodies. They are collections of nerve cells forming a nerve center, especially one located outside the brain or spinal cord. ganglia are given specific names which indicate their function or location, such as acoustic, cardiac, carotid, jugular, etc | |
| 2436. |
Why are gas vacuoles called pseudo vacuoles? |
| Answer» Gas vacuoles are aggregates of hollow cylindrical structures called gas vesicles. They are located inside some bacteria. The inflation and deflation of the vesicles provides buoyancy, allowing the bacterium to float at a desired depth in the water. | |
| 2437. |
What is homosapiens |
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Answer» Scientific name of human being Scientific name of human being.. ? \tHomo sapiens– After Homo erectus came, the Homo sapiens who separated into two types:1) Homo sapiens\xa0neanderthelensisThey had a brain size larger than modern man and were gigantic in size. Also, they had a large head and jaw and were very powerful and muscular . They were carnivores and the tools from the era indicate they were hunters. They were also cave dwellers but their caves were more comfortable and they lived in groups and hunted for food gathering.2) Homo sapiens sapiensAlso known as ‘modern-day man’ is what we are today. Compared to the Homo sapiens neanderthelensis, they became smaller in size and the brain size reduced to 1300cc. There was also a reduction in the size of the jaw, rounding of the skull and chin. Cro- Magnon was the earliest of the Homo sapiens. They spread wider from to Europe, Australia, and the Americas. They were omnivores, had skilful hands, developed the power of thinking, producing art, more sophisticated tools and sentiments. |
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| 2438. |
Which was the first to come from the unicellular cell earth? |
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Answer» But uska scientific name kya tha Bacteria |
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| 2439. |
Why some algae have red , brown and green colour ? |
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Answer» Due to the pigments present in them Algae are mainly classified on the basis of their pigments. Flagellation, storage products and chemistry of cell wall are also taken into account. The three classes of algae are Chlorophyceae (green algae), Phaeophyceae (brown algae) and Rhodophyceae (red algae).\tChlorophyceae: The members of Chlorophyceae are commonly called green algae. The pigments, chlorophyll-a, chlorophyll-b, carotene and xanthophyll are present in them. They are usually grass green in colour due to the dominance of pigments i.e.chlorophyll a and b.\tPhaeophyceae: The members of Phaeophyceae are commonly called brown algae. Brown algae are found primarily in marine habitats. They possess the pigments chlorophyll a and c, carotenoids and xanthophylls.\tRhodophyceae: The members of Rhodophyceae are commonly called Red Algae. The pigments present in them are r-phycoerythrin, r-phycocyanin, chlorophyll-a and chlorophyll-d. The characteristic red colour is due to the predominance of the red pigment r-phycoerythrin. |
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| 2440. |
Does technology need biology? If yes than how ❓ |
| Answer» No i dont think so but for what technology is made is for bio | |
| 2441. |
What is aseptate and coenocytic |
| Answer» Filamentous fungi may contain multiple nuclei in a coenocytic mycelium. A coenocyte functions as a single coordinated unit composed of multiple cells linked structurally and functionally, i.e. through gap junctions. Fungal mycelia in which hyphae lack septa are known as "aseptate" or "coenocytic". | |
| 2442. |
What is humanphobia? |
| Answer» U mean to say Homophobia | |
| 2443. |
Definition of Dikaryon and Dikroyaphase |
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Answer» when plasmogamy is not followed by karyogamy , the stage is called dikaryophase i.e. n+n stage and cell is called dikaryon Koi ni Nahi pata? |
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| 2444. |
Definition of Symbiosis |
| Answer» Symbiosis is a close relationship between two different kinds of organisms, or living things. There are three basic types of symbiotic relationships: mutualism, commensalism, and parasitism. Mutualism is a relationship in which both organisms benefit. For example, bacteria live in the digestive system of cows.\xa0There are three different types of symbiotic relationships: mutualism, commensalism, and parasitism. | |
| 2445. |
Lookdown me ap time pass kase karte ho |
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Answer» Mobile se.... And so kar ???? M bhi mobile se hi Almost phone & also TV Mobile h na ?? |
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| 2446. |
Common features of prion |
| Answer» Prions\xa0are best known as the infectious agents associated with\xa0prion\xa0diseases, the hallmark pathological\xa0features\xa0of which are the spongiform degeneration in the brain, accompanied by extensive neuronal loss, astrogliosis, and cerebral accumulation of the misfolded and protease-resistant form of\xa0prion\xa0protein.\xa0Prions are so small that they are even smaller than viruses and can only be seen through an electron microscope when they have aggregated and formed a cluster. Prions are also unique in that they do not contain nucleic acid, unlike\xa0bacteria,\xa0fungi, viruses and other pathogens. | |
| 2447. |
Slime moulds belongs to which Kingdom?? |
| Answer» Protista | |
| 2448. |
Why some algae have red , brown and green colour? Write their specific name also. |
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Answer» Algaes have different colours in them due to the different types of pigment found in them. Red- rhodophycea, green- chlorophycea, brown- phyophycea. Algae have of different colours because they different pigments in its body. |
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| 2449. |
Explain eukaryotic cell in detail |
| Answer» Eukaryotic cells are cells that contain a nucleus and organelles, and are enclosed by a plasma membrane...........Organisms that have eukaryotic cells include protozoa, fungi, plants and animals............These organisms are grouped into the biological domain Eukaryota. Eukaryotic cells are larger and more complex than prokaryotic cells, which are found in Archaea and Bacteria, the other two domains of life......... | |
| 2450. |
Can Any one explain the whole protozoans kingdom |
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Answer» Thanks to you Protozoans are microscopic unicellular eukaryotic organisms with heterotrophic mode of nutrition. Their nutrition may be holozoic, saprobic, or parasitic. These are divided into four major groups.(1) Amoeboid protozoans or sarcodines They are unicellular, jelly-like protozoa found in fresh or sea water and in moist soil. Their body lacks a periplast. Therefore, they may be naked or covered by a calcareous shell. They usually lack flagella and have temporary protoplasmic outgrowths called pseudopodia for locomotion. These pseudopodia or false feet help in movement and capturing prey. They include free living forms such as Amoeba or parasitic forms such as Entamoeba.(2) Flagellated protozoans or zooflagellatesThey are free living, non-photosynthetic flagellates without a cell wall. They possess flagella for locomotion and capturing prey. They include parasitic forms such as Trypanosoma, which causes sleeping sickness in human beings and free living forms such as Noctiluca.(3) Ciliated protozoans or ciliatesThey are aquatic individuals that form a large group of protozoa. Their characteristic features are the presence of numerous cilia on the entire body surface and the presence of two types of nuclei. All the cilia beat in the same direction to move the water laden food inside a cavity called gullet. They include organisms such as Paramaecium, Vorticella etc.(4) Sporozoans They include disease causing endoparasites and other pathogens. They are uninucleate and their body is covered by a pellicle. They do not possess cilia or flagella. They include the malaria causing parasite Plasmodium. |
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