InterviewSolution
Saved Bookmarks
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.
| 601. |
Question : What is biogas ? How is the use of biogas is beneficial ? |
|
Answer» Solution :Biogas is a fuel gas produced by decomposition of cow-dung, agricultural wastes, vegetable wastes and sewage in absence of oxygen. Since the starting material is mainly cow- dung, it is POPULARLY known as gobar gas. The use of biogas is beneficial as it is considered as an excellent fuel. It contains `75%` methane and BURNS without smoke leaving no residue. Its heating CAPACITY is high. Biogas is used for lighting, for cooking. The slurry left behind is removed periodically and used as excellent manure, rich in nitrogen and phosphorous. It is a safe and efficient method of waste-disposal that UTILISES large AMOUNT of bio-waste and sewage material besides supplying energy and manure. |
|
| 602. |
Question : What is biodiversity ? What is the main aim of conservation of biodiversity ? What are the biodiversity hot spots? |
|
Answer» Solution :Biodiversity is the number and range of variety of species of life FORMS (bacteria, FUNGI, ferns, FLOWERING plants, nematodes, insects, birds, reptiles, etc.) in an area. The main AIM of conservation is to try and preserve the biodiversity that we have inherited. FORESTS are known as .biodiversity hot spots.. |
|
| 603. |
Question : What is Bio-fortification? Give any two examples |
|
Answer» Solution :Biofortification is the scientific process of developing crop plants enriched with high LEVELS of desimble nutrients like vitamins, proteins and minerals. EXAMPLES of crop varieties developed as a result of bio-fortification are (a) Protina, Shakti and Rathna are lysine rich ze hybrids (b) Atlas 66. A protein rich WHEAT VARIETY. |
|
| 604. |
Question : What is being form due to entry of harmful chemical in food chain? |
|
Answer» Bioequilibrium |
|
| 605. |
Question : What is Astrobiology or Exobiology ? What does it deal ? |
|
Answer» Solution :Astrobiology or exobiology, is the science which looks for the PRESENCEOF extraterrestrial in the universe. Astrobiology deal with the origin, evolution and distribution of life in universe and to investigate the possibility of life in other WORLS. The major concept in astrobiology is the habitable zone. Astrobiology explains that any planets can support the exixtance of life, if it fulfils two criteria : (i) It must have a right mass to retain an atmosphere. (i) It must have a right mass to retain an atmosphere. (ii) It must have an orbit at the right DISTANCE from SUN, that it allows liquid water to exist The distance need to be neither too HOT nor too cold and is often called Goldilock zone for life. |
|
| 606. |
Question : Draw a diagram to show sopre formation in Rhizopus. |
Answer» Solution :Production of an offspring by a single parent WITHOUT the formation and fusion of gametes is called Asexual REPRODUCTION. Asexual reproduction occurs by spore formation. In Rhizopus, during spore ormation a structure called sporangium develops from the FUNGAL hypha. The nucleus DIVIDES several TIMES within the sporangium and each nucleus with small amount of cytoplasm develops into a spore. The spores are liberated and they develop into new hypha after reaching the ground or substratum. 
|
|
| 607. |
Question : Whatis ascent of sap ? |
| Answer» Solution :The UPWARD movement of water and minerals from roots to different PLANT PARTS is called ASCENT of SAP. | |
| 608. |
Question : What is ascent of sap? |
| Answer» Solution :Absorbed water from the soil also contains DISSOLVED minerals (nitrates, phosphates, etc.) and HENCE it is called sap. This sap moves UPWARDS due to the ‘transpiration pull’ developed in the xylem elements. Thus, transportation of sap from ROOTS to the leaves at the top is called ascent of sap. | |
| 609. |
Question : what is applicable for Y chromosomes ? |
|
Answer» They LACK DNAgt |
|
| 610. |
Question : What is an ecosystem ? List its two main components. |
|
Answer» SOLUTION :A self-sustaining functional UNIT consisting of living and non-living components is called ECOSYSTEM. Components : Biotic components like PLANTS and animals. Non-biotic components like soil, wind, light ETC. |
|
| 611. |
Question : what is an allele ? |
|
Answer» A gene |
|
| 612. |
Question : What are alleles ? |
| Answer» SOLUTION :The FACTORS MAKING up a pair of CONTRASTING characters are CALLED alleles or allelomorphs. | |
| 613. |
Question : What is air bladder? |
|
Answer» LARVA of TAENIA solium |
|
| 614. |
Question : What is adult onset diabetes ? |
| Answer» Solution :In ADULT ONSET diabetes, insulin production by the pancreas is normal and target CELLS do not RESPOND to insulin. | |
| 615. |
Question : What is addiction? What is the effect of addiction on individuals? |
| Answer» Solution :The physical and mental DEPENDENCY on alcohol, SMOKING and drugs is CALLED addiction. The addictive potential of these substances pulls an individual into a vicious cycle LEADING to REGULAR abuse and dependency. | |
| 616. |
Question : What is abuse? What does it include? |
| Answer» SOLUTION :Abuse REFERS to cruel, violent, HARMFUL or injurous treatment of another HUMAN being. It includes physical, emotional or psychological, verbal, child and sexual ABUSES. | |
| 617. |
Question : What is Abiogenesis ? |
| Answer» Solution :Abiogenesis or SPONTANEOUS generation theory states that life ORIGINATED SPONTANEOUSLY from lifeless matter. It was belived that fishes originated from mud, FROGS moist SOIL san insects from decaying matter. | |
| 618. |
Question : What is a zygote? |
| Answer» Solution :The single diploid mass of CELLS FORMED by the FUSION haploid GAMETES is called a zygote. | |
| 619. |
Question : What is a spore ? Explain asexual reproduction through spore formation. |
|
Answer» Solution :Spore is a microscopic reproductive unit of plant which is COVERED by a protective thick wall. ASEXUAL reproduction through spore: A bread mould e.g., Rhizopus is a simple multi-cellular organism. `rarr` It has thread-like STRUCTURE called hypha. Hyphae are not reproductive parts. `rarr` The fungal hypha develops an enlarged or tiny blob called sporangium. `rarr` The spores are produced and matured in sporangium. `rarr` The spores are covered with thick WALLS which protect them until they come into contact with moist surface. Under favourable condition spores can begin to grow and eventually DEVELOP into new Rhizopus individuals. |
|
| 620. |
Question : What is a sex chromosome? |
| Answer» SOLUTION :The chromosomes which are ASSOCIATED with sex determination are CALLED sex chromosomes. | |
| 621. |
Question : What is a source of energy ? |
| Answer» SOLUTION :A source of ENERGY is one which is capable of providing useful energy in SUFFICIENT AMOUNT. | |
| 622. |
Question : What is a seed ? How does it help in reproduction in plants? |
| Answer» Solution :A seed is the reproductive unit of a plant which can be used to GROW into a new plant. It contains a body plant or embryo and food for the baby plant. The baby plant PRESENT in a seed is in the dormant or inactive state. When the seeds get suitable CONDITIONS of water, warmth, air and light, then new PLANTS grow out of these seeds. In this WAY, the parent plant reproduces more plants like itself by forming seeds through flowers. | |
| 623. |
Question : What is a reflex action ? |
| Answer» SOLUTION :Reflex action is DEFINED as an unconscious and INVOLUNTARY RESPONSE of effectors to a STIMULUS. | |
| 624. |
Question : What is a puffball? |
|
Answer» Fungus |
|
| 625. |
Question : What is a pyrenoid body ? |
| Answer» Solution :PROTEINACEOUS body usually surrounded by STARCH FOUND in algae. | |
| 626. |
Question : What is placenta? Give its functions? |
| Answer» Solution :The placenta is an organ that develops in the uterus during pregnancy. This STRUCTURE provides oxygen and NUTRIENTS to the growing baby and removes WASTE products from baby.s blood. The placenta attaches to the WALL of the uterus, and baby.s UMBILICAL cord arises from it. | |
| 627. |
Question : What is a movement ? What are the different purposes for which movements are seen in organisms ? Give suitable examples. |
|
Answer» Solution :Change in position of an organism is called movement. Movement is one characteristic FEATURE of living beings. Movements are seen for following purposes in organisms : (1) Some movements are GROWTH related. e.g., a seed germinates and grows. SEEDLING develops and shoot system comes out from soil. (2) Running, playing, chewing, etc. are the examples of movement which are not related to growth but for other functions. (3) Some movements are seen as a RESPONSE to change in the environment of the organism or for their advantage. e.g., amoeba expands pseudopodia to ingest food particles, buffaloes chew cud to break-up tough food for better digestion. (4) Some movements are seen for protection. e.g., our pupils constricted when bright light falls on eyes, we pull our hand instantly while touching a hot object. |
|
| 628. |
Question : What is a lacteal and what is its function ? |
| Answer» Solution :Lymph VESSEL found in villi. They help in absorption of fat GLOBULES and then RELEASE them into BLOOD STREAM. | |
| 629. |
Question :What is a homologus series? Explain with an example. |
|
Answer» Solution :A homologus series is a series of carbon compounds that have different number of carbon atoms but contain the same functional group. For example, methane, ethane, propane, butane etc, are all part of the ALKANE homologus series. The general FORMULA of this series in `C_(n)H_(2n+2)` Methane : `CH_3 CH_4` Propane : `CH_3 CH_2 CH_3` Butane : `CH_3 CH_2 CH_2 CH_3` It can be noticed that there is a DIFFERENCE of `CH_2` unit between each successive compounds. |
|
| 630. |
Question : What is a good source of energy ? |
|
Answer» Solution :A good source of energy has following PROPERTIES : `rarr` It would able to do a LARGE amount of work per unit VOLUME or mass. `rarr` It can be easily accessible. `rarr` It can be easy to STORE and transport. `rarr` It can be ECONOMICAL. |
|
| 631. |
Question : What is a good fuel ? |
|
Answer» Solution :A GOOD fuel is the ONE, `rarr` Which burns COMPLETELY without producing smoke or ash. `rarr` Which PRODUCES large amount of heat while burning a small quantity of It. `rarr` Which is easily available and ECONOMICAL. |
|
| 632. |
Question : What is a gene? |
| Answer» Solution :A part of DNA on CHROMOSOME, CAPABLE of coding for a POLYPEPTIDE. | |
| 633. |
Question : What is a folder ? |
| Answer» Solution :A folder is a STORAGE space that contains multiple FILES. We can create files as per the user.s NEED. | |
| 634. |
Question : What is a cross in which inheritance of two pairs of contrasting characters are studied? |
| Answer» SOLUTION :DIHYBRID CROSS | |
| 635. |
Question :What is a clone? Why do offsprings formed by asexual reproduction exhibit remarkable similarity? |
| Answer» Solution :Clone refers to offspring of an ORGANISM formed by ASEXUAL method of reproduction. Since they possess exact COPIES of the DNA of their PARENT, CLONES exhibit remarkable similarity | |
| 636. |
Question : What helps to store oxygen in our muscles? |
|
Answer» ACTIN |
|
| 637. |
Question : What happens when (i) Planaria gets cut into two pieces (ii) A mature Spirogyra filament attains considerable length? (iii) On maturation sporangia burst? |
|
Answer» Solution :(i) Each PIECE regenerates into a new planaria. (ii) Its filaments breaks into smaller pieces/fragments and each fragment gives RISE to a new filament. (iii) It RELEASES spores which GERMINATE into new MYCELIUM in moist conditions. |
|
| 638. |
Question : What happens when : On maturation sporangia of Rhizopus bursts? |
|
Answer» SOLUTION :In many fungi, like Rhizopus, spore formation takes place in spore sacs called sporangia. These spores, being thick walled, survive harsh conditions and can GROW into a complete organism under favourable conditions. Spore formation is the most common method of asexual REPRODUCTION seen in fungi and bacteria. During spore formation, a structure called sporangium develops from the fungal hyphae. The nucleus divides SEVERAL times within the sporangium and each nucleus with a bit of cytoplasm, develops into a spore. The spores are liberated and they DEVELOP into new hyphae after reaching the ground. e.g., Rhizopus, Mucor and Penicillium. |
|
| 639. |
Question : What happens when : Bryophyllum leaf falls on the wet soil ? |
| Answer» Solution :ADVENTITIOUS buds PRESENT on the LEAF margin at notches begin to grow to give rise to a new plant, when Bryophyllum leaf falls on WET soil. | |
| 640. |
Question : What happens when : Accidently, Planaria gets cut into many pieces ? |
| Answer» Solution :MULTICELLULAR organisms with cell differentiation, when CUT in SMALL PIECES, may regrow into complete organism, e.g., Planaria and Hydra. This process is known as REGENERATION Regeneration is also seen in Hydra . | |
| 641. |
Question : What happens when (a) Planaria gets cut into two pieces? (b) A mature Spirogyra filament attains considerable length? (c) On maturation sporangia burst? |
|
Answer» Solution :(a) Each PIECE regenerates into a new Planaria. (B) Its filaments break into smaller pieces or fragments and each FRAGMENT gives rise to a new filament. (c) It releases SPORES which GERMINATE into new mycelium in moist conditions. |
|
| 642. |
Question : What happens when a Planaria gets cut into two pieces? |
| Answer» SOLUTION : Each PIECE REGENERATES into a NEW PLANARIA. | |
| 643. |
Question : What happens when a mature Spirogyra filament attains considerable length? |
| Answer» SOLUTION :When a MATURE Spirogyra filament attains CONSIDERABLE length its filament breaks up into smaller FRAGMENTS and each fragment grows into a new filament or individual. | |
| 644. |
Question : What happens when a mature Spirogyra filament attains considerable length ? |
| Answer» SOLUTION :Its filament breaks up into SMALLER FRAGMENTS or pieces, and each FRAGMENT grows into a new filament/individual. | |
| 645. |
Question : What happens to visible light of the sun when it falls on chlorophyll? |
| Answer» SOLUTION :Visible light of the sun consists of seven colours—violet, indigo, blue, green, yellow, orange and red. Out of these lights of different wavelengths, chlorophyll absorbs mainly blue, violet, red and orange lights but does not ABSORB the green light. It is due to the reflection of green light by chlorophyll of the PLANTS that the plants look green in COLOUR. | |
| 646. |
Question : What happens to the rate of breathing during vigorous exercise and why? |
| Answer» Solution :During VIGOROUS exercise, our BODY requires more energy and for this PURPOSE more oxygen is NEEDED, so the rate ofbreathing is INCREASED. Oxygen intake rate increases by about 20 to 25 times. | |
| 647. |
Question : What happens to ovule and ovary after fertilisation in a flowering plant ? |
| Answer» Solution :After FERTILISATION OVULE DEVELOPS into the SEEDS and the ovary develops into fruit. | |
| 648. |
Question : What happens to glucose which enters the nephron along with the filtrate? |
| Answer» Solution :GLUCOSE along with filtrate runs down through the long renal tubule by the action of cilia. Glucose, amino ACIDS, salts, ETC., are reabsorbed by the TUBULAR CELLS and then secreted into the capillary blood cells by diffusion. | |
| 649. |
Question : What happens to a person suffering from hemophilia ? |
| Answer» Solution :The person suffering from haemophilia lacks CLOTTING FACTORS in blood, which RESULT the defective clotting MECHANISM. In case of injury the person is at a RISK of blood loss. | |
| 650. |
Question : What happens if there are no decomposers on the Earth ? |
|
Answer» SOLUTION :(i) Every COMPONENT of the ecosystem plays a significant role in it. (ii) Decomposers have a role of returning the materal from the dead organism to the nature by the process called DECOMPOSITION. (iii) If decomposers are absent, this process will not take place and the Earth will see dead bodies everywhere, thus increasing garbage. (IV) Ifmaterials are not returned to the SURROUNDINGS, then they are not made available for recycling. (v) Ultimately ecosystems would be buried under a heap of garbage. |
|