McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: General Knowledge (GK) .
| 1451. |
A universal recipient has the blood group – |
| A. | B |
| B. | AB |
| C. | A |
| D. | O |
| Answer» B. AB | |
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Explanation: Individuals with type O blood are often called universal donors, and those with type AB blood are called universal recipients. Blood group O Individuals do not have either A or B antigens on the surface of their RBCs, and their blood serum contains IGM anti-A and anti- B antibodies. Therefore, a group O individual can receive blood only from a group O individual, but can donate blood to individuals of any ABO blood group (Le., A, B, O or AB). |
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| 1452. |
Symbiotic Bacteria responsible for the fixation of atmospheric nitrogen are present in - |
| A. | peas |
| B. | wheat |
| C. | corn |
| D. | oats |
| Answer» A. peas | |
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Explanation: Nitrogen-fixing bacteria are microorganisms capable of transforming atmospheric nitrogen into fixed. nitrogen. Rhizobium is one such bacteria that is associated with leguminous plants (e.g., various members of the pea family). It invades the root hairs of host plants and convert free nitrogen to ammonia, which the host plant utilizes for its development. |
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| 1453. |
If xylem and phloem are arranged in the same radius, such a vascular bundle is called : |
| A. | collateral |
| B. | bicollateral |
| C. | concentric |
| D. | radial |
| Answer» A. collateral | |
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Explanation: In the collateral type of vascular bundle, xylem and phloem are arranged side by side on the same radius. This may be either open or closed. Usually xylem is seen towards the inner side and phloem towards outer side. The collateral vascular bundle is also known as conjoint. |
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| 1454. |
Amino acids are required for the synthesis of – |
| A. | Alkaloids |
| B. | Lipids |
| C. | Proteins |
| D. | Carbohydrates |
| Answer» C. Proteins | |
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Explanation: Amino acids are required for the synthesis of body protein and other important nitrogen-containing com-pounds. Amino acids are constituents of protein and act as precursors for many coenzymes, hormones, nucleic acid, etc. Adult humans are unable to synthesize all twenty amino acids needed for protein synthesis; those which cannot be synthesized and which must then be acquired via the diet are referred to as essential. |
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| 1455. |
The substrate of Photorespiration is – |
| A. | Fructose |
| B. | Pyruvic acid |
| C. | Glycolate |
| D. | Glucose |
| Answer» C. Glycolate | |
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Explanation: Glycolate is the major substrate for photorespiration. The enzymes of glycolate metabolism, e.g. glycolate oxidase and catalase, are present in substantial quantities in leaf extracts from both high and low capacity plants. Glycolate has been detected in leaves of both types of plants. |
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| 1456. |
13-Diversity is also known as – |
| A. | Within habitat diversity |
| B. | Ecosystem diversity |
| C. | Global diversity |
| D. | Between habitat diversity |
| Answer» B. Ecosystem diversity | |
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Explanation: Biodiversity includes three main types: diversity within species (genetic diversity), between species (species diversity) and between ecosystems (ecosystem diversity). Ecological diversity is the intricate network of different species present in local ecosystems and the dynamic interplay between them. |
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| 1457. |
Interferons are synthesized in response to – |
| A. | Bacteria |
| B. | Fungi |
| C. | Myroplasma |
| D. | Virus |
| Answer» D. Virus | |
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Explanation: Interferons (IFNs) are a group of signaling proteins made and released by host cells in response to the presence of pathogens, such as viruses, bacteria, parasites, or tumor cells. Interferon synthesis occurs primarily in response to viral single-stranded or double stranded RNA that are either the genetic material of RNA viruses or a product of viral transcription. Interferons are named for their ability to "interfere" with viral replication by protecting cells from virus infections. |
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| 1458. |
The resources which are obtained from bio sphere and have life are – |
| A. | Potential resources |
| B. | Biotic resources |
| C. | Abiotic resources |
| D. | Renewable resources |
| Answer» B. Biotic resources | |
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Explanation: Biotic resources describe living or once living resources of a community; for example organisms, such as plants and animals. They are obtained from the biosphere and have life. The resources which are composed of non- living things are called Abiotic Re-sources. For example, water, minerals, metals, wind, solar energy etc. |
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| 1459. |
Myrtecaine is study of – |
| A. | Insects |
| B. | Ants |
| C. | Crustaceans |
| D. | Arthropods |
| Answer» B. Ants | |
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Explanation: Myrmecology is the scientific study of ants, a branch of entomology. The word myrniecology was coined by William Morton Wheeler (1865-1937), al-though human interest in the life of ants goes back further, with numerous ancient folk references. |
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| 1460. |
HIV often changes its shape due to the presence of an enzyme called |
| A. | Reverse Transcriptase |
| B. | Enterokinase |
| C. | Nucleotidase |
| D. | Nucleoditase |
| Answer» A. Reverse Transcriptase | |
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Explanation: Use of the reverse transcriptase enzyme is a unique characteristic of retroviruses such as HIV. After the virus releases its genetic material into a host cell, reverse transcriptase converts the viral RNA into a complementary piece of DNA. This process is known as 'reverse transcription'. |
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| 1461. |
The largest White Blood Corpuscle is – |
| A. | Lymphocyte |
| B. | Monocyte |
| C. | Thrombocyte |
| D. | Erythrocyte |
| Answer» B. Monocyte | |
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Explanation: Monocytes are the largest white blood cell. When they leave the blood they're called macrophages. |
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| 1462. |
Root Hairs arise from - |
| A. | Cortex |
| B. | Pericycle |
| C. | Epidermis |
| D. | Endodermis |
| Answer» C. Epidermis | |
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Explanation: Root hairs are tubular-shaped tipgrowing cells that arise from epidermal cells known as trichoblasts, behind the tips of young roots. Like all tip-growing cells, root hairs grow by the addition of cell wall precursors to the tip delivered by vesicles from the endomembrane system. |
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| 1463. |
Vermicomposting is done by - |
| A. | Fungus |
| B. | Bacteria |
| C. | Worms |
| D. | Animals |
| Answer» C. Worms | |
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Explanation: Vermicomposting is the process of using worms and micro-organisms to turn kitchen waste into black, earthy-smelling, nutrient-rich humus. Vermi-compost is an excellent, nutrient-rich organic fertilizer and soil conditioner. |
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| 1464. |
If waste materials contaminate the source of drinking water, which of the following diseases will spread? |
| A. | Scurvy |
| B. | Typhoid |
| C. | Malaria |
| D. | Anaemia |
| Answer» B. Typhoid | |
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Explanation: 0 |
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| 1465. |
A cell increases in volume when it is placed in - |
| A. | Hypertonic solution |
| B. | Hypotonic solution |
| C. | Isotonic solution |
| D. | None of these |
| Answer» B. Hypotonic solution | |
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Explanation: When a cell is placed in a hypotonic solution, water rushes into the membrane, increasing the cell's volume. Eventually, the cell's membrane is enlarged such that it pushes against the cell's rigid wall. At this point the cell is said to be turgid. |
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| 1466. |
Translocation of water is - |
| A. | Apoplastic |
| B. | Syrnplastic |
| C. | Both (1) and (2) |
| D. | None of the above |
| Answer» C. Both (1) and (2) | |
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Explanation: The transport of soluble organic substances (sometimes called assimilates) within a plant is known as translocation. Both the Symplast and the apoplast function in transport within tissues and organs of plants. Water passes into the stele through symplastic route; Water passes into the .xylem through apoplastic route. |
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| 1467. |
Five Kingdom classification was given by |
| A. | Whittaker |
| B. | Haeckel |
| C. | Linneus |
| D. | Copeland |
| Answer» A. Whittaker | |
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Explanation: Robert Harding Whittaker was a distinguished. American plant ecologist who was the first to propose the five-kingdom taxonomic classification of the world's biota into the Animalia, Plantae, Fungi, Protista, and Monera in 1969. He also proposed the Whittaker Biome Classification, which categorized biometypes upon two abiotic factors: temperature and precipitation. |
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| 1468. |
Animals with Chitinous exoskeleton are |
| A. | Insects |
| B. | Sponges |
| C. | Sea-Urchin |
| D. | Snails |
| Answer» A. Insects | |
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Explanation: Chitin is the main component of the cell walls of fungi, the exoskeletons of arthropods such as crustaceans (e.g., crabs, lobsters and shrimps) and insects, the radulas of mollusks, and the beaks and internal shells of cephalopods, including squid and octopuses. Combined with calcium carbonate, as in the shells of Crustacean and mollusks, chitin produces a much stronger composite. |
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| 1469. |
The casual organism of Polio is - |
| A. | A fungi |
| B. | A virus |
| C. | A worm |
| D. | A bacteria |
| Answer» B. A virus | |
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Explanation: Polio is a highly infectious disease caused by a virus. Its causative agent, poliovirus, was identified in 1908 by Karl Landsteiner. The polio virus invades the nervous system, and can cause total paralysis in a matter of hours. |
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| 1470. |
Panda belongs to the same family as that - |
| A. | Kangaroo |
| B. | Porcupine |
| C. | Whale |
| D. | Bear |
| Answer» D. Bear | |
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Explanation: It is generally considered that the Panda belongs to the bear family, though differences persist. Some DNA studies have shown that the giant panda is closer to the bear family while the red panda is indeed closer to the raccoon family. |
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| 1471. |
What is the average 'Intelligence Quotient (IQ) of normal' persons? |
| A. | 100 to 120 |
| B. | 90 to 110 |
| C. | 70 to 130 |
| D. | 50 to 100 |
| Answer» B. 90 to 110 | |
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Explanation: IQ is a number meant to measure people cognitive abilities (intelligence) in relation to their age group. An LQ between 90 and 110 is considered average; over 120, superior. |
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| 1472. |
A Parenchyma cell which stores ergastic substance is known as – |
| A. | Phragmoblast |
| B. | Idioblast |
| C. | Conidioplast |
| D. | Chloroplast |
| Answer» B. Idioblast | |
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Explanation: Parenchyma cells containing ergastic substances are called idioblasts. Tannin cells, cells filled with raphides, etc. constitute idioblast. An idioblast is an isolated plant cell that differs from neighboring tissues. It carries out storage of reserves. |
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| 1473. |
Green manure is obtained from – |
| A. | Domestic vegetable waste |
| B. | Oil seed husk cakes |
| C. | Fresh animal excreta |
| D. | Decomposing green legume plants |
| Answer» D. Decomposing green legume plants | |
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Explanation: Green undecomposed material used as manure is called green manure. It is obtained in two ways: (1) growing green manure crops usually belonging to leguminous family and incorporating into the soil after sufficient growth or (2) by collecting green leaf from plants grown in wastelands, field bonds and forest. The most important green manure crops are sunnhemp, dhaincha,. etc. |
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| 1474. |
Movement of hairs in Drosera is referred to as – |
| A. | Heliotropism |
| B. | Thigmotropism |
| C. | Photonastic |
| D. | Seismonastic |
| Answer» B. Thigmotropism | |
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Explanation: Thigrnonasty (thigmotropism) refers to plant movement in response to touch or physical contact without regard to the direction of the stimulus. Thigmonastic movements are exemplified by the closing of the insect-eating plant Venus's flytrap (Dionaea muscipula) and the bending of the glandular hairs of sun-dew (Drosera sp.) as a result of contact with an insect. |
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| 1475. |
The histogen, from which epidermis is formed, is – |
| A. | Dermatogen |
| B. | Perlblern |
| C. | Plerome |
| D. | Calyptrogen |
| Answer» A. Dermatogen | |
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Explanation: There are three meristematic layers in plants which consist of three sets of initials known as histogen. Dermatogen is the outermost layers, the cells of which divide anticlinally and give rise to the epidermis. Peri- Nem and Plerome are the other two histogen, |
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| 1476. |
The kidney shaped guard cells are present in – |
| A. | Dicot plants |
| B. | Monocat plants |
| C. | Both the above |
| D. | Algae |
| Answer» A. Dicot plants | |
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Explanation: The guard cells in dicot plants are kidney shaped and dumbbell shaped in monocots. When guard cells expand on the outer edges of the stoma, but not on the inner side, they result in kidney-shaped cells, leading to an opening or pore between the two guard cells for gas exchange. |
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| 1477. |
The scavengers earth are – |
| A. | Bacteria |
| B. | Viruses |
| C. | Algae |
| D. | Fun |
| Answer» C. Algae | |
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Explanation: Scavenger is an organism that mostly consumes decaying biomass, such as meat or rotting plant material. Blue-green algae (BGA) inhibit lipid peroxidation and have free radical scavenging. |
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| 1478. |
Bone ossification test is conducted to as certain human - |
| A. | Brain efficiency |
| B. | Tentative age |
| C. | Tentative height |
| D. | Drug addiction |
| Answer» B. Tentative age | |
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Explanation: Ossification is the process of laying down new bone material by cells called osteoblasts. It is synonymous with bone tissueformation. As per scientific evidence, by the age of 25 years nearly all bones are completely ossified in humans. Ossification test is a guess work based on the fusion of joints in the human body b/w birth and, age 25. Ii all joints are fused the person must be of 25 yrs of age or older. |
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| 1479. |
The nutritive tissue in the seeds of higher plants is known as - |
| A. | hypocotyl |
| B. | embryo |
| C. | endosperm |
| D. | nucellus |
| Answer» C. endosperm | |
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Explanation: The seed includes three primary regions: the embryo, nutritive tissue, and seed coat. Endosperm is a nutritive tissue that sustains the embryo and seedling. The endosperm may be consumed by the embryo as in many legumes, which use the cotyledons as a food source during germination. |
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| 1480. |
Yeast is an important source of – |
| A. | vitamin B |
| B. | invertase |
| C. | vitamin C |
| D. | protein |
| Answer» A. vitamin B | |
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Explanation: Yeast is an impOrtant source of most B vitamins (except 1312) and folate and contains potassium and magnesium. It is used in the preparation of vitamin B complex tablets. |
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| 1481. |
In cactus, the spines are the modified – |
| A. | stern |
| B. | stipulse |
| C. | leaves |
| D. | buds |
| Answer» C. leaves | |
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Explanation: Most cactus morphologists have concluded that cactus spines are modified leaves. They are wholly transformed leaves that protect the plant from herbivores, radiate heat from the stem during the day, and collect and drip condensed water vapour during the cooler night. |
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| 1482. |
The smallest known prokatyotic organism is – |
| A. | Microcystis |
| B. | Mycoplasma |
| C. | Bacteria |
| D. | Chlorella |
| Answer» B. Mycoplasma | |
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Explanation: Mycoplasmas are the smallest and simplest prokaryotes capable of self-replication. Keeping the number of structural elements, metabolic pathways and components of the protein synthesizing machinery to an essential minimum places Myeoplasmas closest to the concept of 'minimum cells'. |
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| 1483. |
Energy is stored in liver and muscles in the form of – |
| A. | carbohydrate |
| B. | fat |
| C. | protein |
| D. | glycogen |
| Answer» D. glycogen | |
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Explanation: Muscle and liver cells have a high capacity for glycogen storage because they require fast access when the need for it arises. |
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| 1484. |
Pepsin digests . |
| A. | proteins in stomach |
| B. | carbohydrates in mouth |
| C. | fats in duodenum |
| D. | minerals in ileum |
| Answer» A. proteins in stomach | |
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Explanation: Pepsin is produced in the stomach and is one of the main digestive enzymes in the digestive systems of humans and many other animals, where it helps digest the proteins in food. |
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| 1485. |
Iraercalary meristems are found in – |
| A. | Node |
| B. | Lateral bud |
| C. | Terminal bud |
| D. | Inter node |
| Answer» D. Inter node | |
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Explanation: Intercalary meristem is meristem at the base of the internode in monocot stems (particularly grass stems). Only the apical meristem is active. If the tip of the stem is removed, the uppermost intact inter - calary meristem becomes the apical meristem and starts intercalary growth. |
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| 1486. |
Which of the following pairs is correctly matched? |
| A. | Vitamin-A : Scurvy |
| B. | Vitamin-B : Rickets |
| C. | Vitamin-C : Nightblindness |
| D. | Vitamin-E : Reproduction |
| Answer» D. Vitamin-E : Reproduction | |
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Explanation: Vitamin E is a fat soluble vitamin that is essential in many physiological processes. It plays an important role in the health and maintenance of proper reproductive system function. Without vitamin E the body cannot reproduce. It is also essential during pregnancy and is needed for the proper health and development of the fetus. |
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| 1487. |
Which of the following is not a stern modification? |
| A. | Bulb of Onion |
| B. | Corm of Arvi |
| C. | Tuber of Sweet-potato |
| D. | Tuber of Potato |
| Answer» C. Tuber of Sweet-potato | |
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Explanation: A modified stem is a part of a plant with special features developed for special functions. Modified stems can be found either above or below ground. Examples of above the ground modified stems include; crowns, stolons, runners or spurs, while below the ground include; bulbs, corms, rhizomes, tubers and tendrils. Sweet potato is an example of a tuberous root. |
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| 1488. |
Clitellum is found in – |
| A. | Leech |
| B. | Snail |
| C. | Nereis |
| D. | Earthworm |
| Answer» D. Earthworm | |
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Explanation: The clitellum is a thickened glandular and non-segmented section of the body wall near the head in earthworms and leeches, that secretes a viscid sac in which the eggs are deposited. Its main function is to store the eggs of the earthworm. |
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| 1489. |
Water of coconut is – |
| A. | liquid nucellus |
| B. | liquid rnesocarp |
| C. | liquid endocarp |
| D. | degenerated liquid endosperm |
| Answer» D. degenerated liquid endosperm | |
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Explanation: Coconut water, the cleailiquid inside young green coconuts (fruits of the coconut palm), is liquid endosperm. In early development, it serves as a suspension for the endosperm of the coconut during their nuclear phase of development. It contains sugars,vitamins, minerals, proteins, free amino acids and growth promoting factors. |
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| 1490. |
Bulbils takes part in - |
| A. | Sexual reproduction |
| B. | Vegetative reproduction |
| C. | Food storage |
| D. | Respiration |
| Answer» B. Vegetative reproduction | |
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Explanation: Bulbil is a small bulblike organ of vegetative re-production growing in leaf axils or on flower stalks of plants such as the onion and tiger lily. It is a reproductive organ that takes part in vegetative reproduction. The bulbils drop from the parent plant on to the ground, give out adventitious roots and develop into new plants. |
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| 1491. |
Foramen Magnum is an aperture found in the – |
| A. | Ear |
| B. | Lung |
| C. | Girdle |
| D. | Skull |
| Answer» D. Skull | |
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Explanation: The foramen magnum ("great hole") is a large opening in the occipital bone of the cranium. It is one of the circular apertures in the base of the skull (the foramina), through which the spinal cord (an extension of the medulla oblongata) enters and exits the skull vault. |
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| 1492. |
Eutrophication of a water body enhances – |
| A. | Organic matter production |
| B. | Biological oxygen demand |
| C. | Both (1) and (2) |
| D. | Neither (1) nor (2) |
| Answer» C. Both (1) and (2) | |
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Explanation: Eutrophication is the ecosystem response to the addition of artificial or natural substances, such as nitrates and phosphates, through fertilizers or sew-age. It leads not onlyto increased levels of nutrients, but increased Biological Oxygen Demand as well. |
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| 1493. |
What is farming along with animal husbandry called? |
| A. | Mixed farming |
| B. | Mixed agriculture |
| C. | Dairy farming |
| D. | Truck farming |
| Answer» A. Mixed farming | |
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Explanation: When on a farm along-with crop production, some other agriculture based practice like poultry, dairy fanning or bee keeping etc. is adopted, then this system of fanning is known as mixed farming. It is dominant in India, where most farms have a mixture of fields and pastures. |
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| 1494. |
Beak is formed by – |
| A. | cheeks |
| B. | jaws |
| C. | teeth |
| D. | None |
| Answer» B. jaws | |
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Explanation: Although beaks vary significantly in size and shape from species to species, their underlying structures have a similar pattern. All beaks are composed of two jaws, generally known as the upper mandible (or maxilla) and lower mandible (or mandible). |
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| 1495. |
Pinna (external ear) is present in – |
| A. | Amphibian |
| B. | Fish |
| C. | Mammal |
| D. | Reptile |
| Answer» C. Mammal | |
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Explanation: Outer Ear or Pinna is found only in terrestrial mammals. It is composed of a thin plate of yellow elastic cartilage, covered with integument, and connected to the surrounding parts by ligaments and muscles. |
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| 1496. |
Plant genetic material in 'Gene-Bank' is preserved at - 196° C in liquid nitrogen as |
| A. | seedling and rneristern |
| B. | mature seed (dry) |
| C. | pre-mature seed (high moisture) |
| D. | ripe fruit |
| Answer» B. mature seed (dry) | |
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Explanation: Plant genetic material in 'GENE BANK' is preserved at -196° Celsius in Liquid Nitrogen as mature seed (dry). In plants, it is possible to unfreeze the material and propagate it. |
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| 1497. |
Flowers emit fragrance to : |
| A. | purify air |
| B. | drive away flies |
| C. | attract insects |
| D. | perform all the above |
| Answer» C. attract insects | |
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Explanation: Flowers emit fragrance to attract pollinators which are mainly insects. The fragrance plays a prominent role in the localization and selection of flowers by insects, especially moth-pollinated flowers, which are detected and visited at night. |
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| 1498. |
In a poultry unit, the factor most influencing the cost is the cost of – |
| A. | feed |
| B. | transportation |
| C. | chicks |
| D. | medicines |
| Answer» A. feed | |
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Explanation: Feed cost is one of the important variable costs that plays a big role in determining the poultry cost. Variable costs rise and fall with the size of the output and the level of the operation. Fixed costs (for items such as taxes, insurance, interest, and depreciation on buildings and equipment), are incurred whether or not there is any output. |
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| 1499. |
Which of the following three R's are regarded as environment friendly? |
| A. | Reduce, Rebuild, Restrict. |
| B. | Random, Reduce, Recall. |
| C. | Read, Register, Recall. |
| D. | Reduce, Reuse, Recycle. |
| Answer» D. Reduce, Reuse, Recycle. | |
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Explanation: The 3 R's of eco-friendly living are: Reduce, Reuse and Recycle. They all help to cut down on the amount of waste we throw away. They conserve natural resources, landfill space and energy. |
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| 1500. |
Solitary cymose inflorescence is observed in – |
| A. | Rose |
| B. | Chinarose |
| C. | Tuberose |
| D. | Gardenia |
| Answer» D. Gardenia | |
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Explanation: Solitary cymose inflorescence refers to a determinate inflorescence composed of a single flower. Examples include poppy, gardenia (ornamental plant), tulip, etc. Flowers are said to be solitary when the plant bears only one, or when single flowers appear on the ends of lateral branches that are remote from one another. |
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