Category: Diet & Nutrition

80 Questions with Answers and Explanations on “Plant Kingdom” for Botany Students.1. Sexual reproduction involving fusion of two cells in Chlamydomonas is Image Source: c14608526.r26.cf2.rackcdn.com ADVERTISEMENTS: (a) isogamy(b) homogamy(c) somatogamy(d) hologamy. ADVERTISEMENTS: Answer and Explanation:1. (d): Isogamy involves the fusion of gametes which are morphologically and physiologically similar. They are called isogametes. In Chlamydomonas, two vegetative cells may fuse to form a zygospore and the phenomenon is called as hologamy. As a result of fusion of two gametes, zygospore is formed.2. Prothallus (gametophyte) gives rise to fern plant (sporophyte) without fertilization. It is (a) apospory ADVERTISEMENTS: (b) apogamy(c) parthenocarpy(d) parthenogenesis.Answer and Explanation:2. (b): Prothallus (gametophyte) gives rise to fern plant (sporophyte) without fertilization. This phenomenon is called apogamy. Development of sporophyte from gametophyte without forming gamete is apogamy. Such sporophyte…

20 Questions with Answers and Explanations on “Kingdom Fungi” for Biology Students.1. Lichens indicate SO2 pollution because they Image Source: images.slideplayer.com ADVERTISEMENTS: (a) show association between algae and fungi(b) grow faster than others(c) are sensitive to SO2(d) flourish in SO2 rich environment. ADVERTISEMENTS: Answer and Explanation:1. (c): Lichens are found in Artie Tundra region where no other plant can grow. Lichens prefer to grow in pollution free environment. They are often used as a indicator of pollution and also they are very sensitive to SO2. They are first to die in a polluted environment (more SO2).2. Absorptive heterotrophic nutrition is exhibited by (a) algae ADVERTISEMENTS: (b) fungi(c) bryophytes(d) pteridophytes.Answer and Explanation:2. (b): The true fungi or the eumycetes are special types of achlorophyllous thallophytic organisms living a parasitic or a…

Anticoagulant prevents clotting from blood. It is used in haematological laboratory where complete blood or plasma is required; depending upon the test to be done, the type of anticoagulant is decided.Most of the anticoagulants prevent clotting by removing calcium, or iron which are necessary for clotting process. Every anticoagulant is added in fixed proportion to blood. Source Image:siriomedicine.files.wordpress.com ADVERTISEMENTS: Anticoagulants are of following types:Chemical Anticoagulant:These anticoagulants are prepared in laboratory.These are as follows. ADVERTISEMENTS: i. Citrate:a. Trisodium citrateb. Disodium citrateii. EDTA: Ethylene diamine tetracetic acid ADVERTISEMENTS: iii. CPD: Citrate phosphate dextroseiv. OxalateCitrate: a. Trisodium citrate:This anticoagulant is prepared by dissolving 3.8 gm of tri-sodium citrate in 100 ml of distilled water. 0.4 ml of anticoagulant is required for 2 ml of blood. Addition of dextrose to anticoagulant provides nutrition to…

1. Role of Plant Physiology in the Improvement of Varieties: Plant breeders use the method of selection for crop improvement. Selection on the basis of only external characters is not fruitful. Image Source: qsarticle.comTherefore, its protein content, oil content, carbohydrate content and various other substances of nutritional importance must be tested before proper selection. Plant physiology thus plays an important and essential role in specifying the features for which the plant breeder must select the crop. 2. Role in Soil Fertility: ADVERTISEMENTS: Our knowledge of mineral nutrition of different crop plants provided extensive revisions in the application of fertilizers. It is now possible to recommend specific organic fertilizers or inorganic salts using knowledge of plant physiology. 3. Role of Auxins: (a) Auxins are used to prevent premature fruit drop, when…

Nutrition may be defined as the science of food and its relationship to health. It is one of the most important elements of health care. Now a day’s greater emphasis is laid on nutrition to provide better health to the families and communities. image source: notizie.itUndernourishment and malnutrition lead to so many diseases like tuberculosis, goitre, anaemia, beri-beri, night blindness and infections of skin, gastro-intestinal and respiratory tract. ADVERTISEMENTS: The dietary factors play a major role in non-communicable diseases like heart disease, diabetes, obesity, hypertension, disorder of liver and gall bladder etc. Poverty, economic inability and illiteracy are the important causes of malnutrition. Therefore diseases are more common in poor people rather than economically better and educated people.Through centuries food has been recognized as an important constituent for human beings…

Q. 1. What are the three critical research areas of biotechnology? Ans. The critical research areas of biotechnology are: Image Source: frontiersin.orgResearch areas of bio-technology ADVERTISEMENTS: 1. Providing best catalyst:To provide best catalyst in the form of a microbe or pure enzyme, e.g. insulin.2. Creating optimal conditions: ADVERTISEMENTS: To create optimal conditions through engineering for a catalyst to act.3. Down stream processing:To provide down stream processing technologies to purify the protein or organic compound produced by the microbe.Q. 2. Compare and contrast the advantages and disadvantages of production of genetically modified crops. ADVERTISEMENTS: Ans. The production of the crops for high food production by traditional methods has its own problems.It needs the inputs of agrochemicals such as synthetic chemical fertilizers and pesticides to ensure the productivity.It has its limitations as…

20 Questions with Answers and Explanations on “Food Production” for Biology Students: Image Source: pnas.orgQ. 1. Name the fowl used for poultry. Ans. ADVERTISEMENTS: (1) Chicken(2) Duck(3) Turkey(4) Geese. ADVERTISEMENTS: Q. 2. How is inbreeding different from out breeding? Ans. In inbreeding, the breeding is between animals of the same breed whereas in out breeding the breeding is by crossing animals of different breeds.Q. 3. What does superior female mean in cow or buffalo? ADVERTISEMENTS: Ans. Superior female means it produces more milk per lactation period.Q. 4. What is superior male in cow or buffalo? Ans. Superior male means the bull which gives rise to superior progeny as compared to other bulls/males.Q. 5. How does inbreeding depression take place? Ans. Continued inbreeding (specially close breeding) leads to inbreeding depression. It…

21 Questions with Answers and Explanations on “Human Reproductions” for Biology Students: Image Source: online.science.psu.eduQ. 1. Mention the different parts of human male reproductive system. Ans. 1. Testes (1 pair), ADVERTISEMENTS: 2. Glands,3. Accessory ducts4. External genitalia. ADVERTISEMENTS: Q. 2. Mention the role of scrotum/scrotal sacs. Ans. 1. It holds the testis.2. Provides low temperature (2-2.5°c less) than the body.Q. 3. What is the number of testicular lobules and seminiferous tubules in each lobule in human testis? ADVERTISEMENTS: Ans. Testicular lobules-250 in each testis.Semineferous tubules in each lobule-1-3.Q. 4. Mention the cells that are present on inner layer of semineferous tubules. Ans. 1. Male germ cells (spermatogonia)2. Sertoli cells. Q. 5. What are these structures collectively called? Vasa efferentia, rete testis, epididymis and vas deferens. Ans. Human male sex accessory…

24 Questions with Answers and Explanations on “Ecosystem” for Biology Students: Image Source: sitemaker.umich.eduQ. 1. Mention any two examples of manmade ecosystem. Ans. (1) Crop fields ADVERTISEMENTS: (2) AquariumQ. 2. Mention the basic requirement for any ecosystem to function and sustain. Ans. Solar energy. ADVERTISEMENTS: Q. 3. Name the types of productivity and the organism responsible?Ans. Primary productivity— plants.Secondary productivity —consumers.Q. 4. Mention the raw material of decomposition. ADVERTISEMENTS: Ans. Detritus.Q. 5. Select the odd one out: (a) Fecal matter,(b) Dead leaves, (c) Thermocol, (d) Bark. Ans. (c) ThermocolQ. 6. Give an example to detritivore. Ans. Earthworm.Q. 7. Expand the term PAR. Ans. Photosynthetically Active Radiation.Q. 8. How much percentage of PAR is captured by the producers to produce food for entire world? Ans. 2%—10%Q. 9. Name the herbivores of…