428. What is ploughing and cultivating the land called?
429. What is the act of supplying water to a field through artificial means called?
430. What is the averages rate of the heart beats (per minute) in an adult?
431. What is the first step in photosynthesis:
432. What is the function of Bile Juice secreted by Liver?
433. What is the Function of Hydrochloric Acid? (i) It makes pepsin enzyme effective. (ii) It kills bacteria which may enter in stomach with food. Which of the following statements is/are correct?
434. What is the gestation period of camel?
435. What is the mode of nutrition called in which organisms cannot make its own food from simple inorganic material and depends on other organisms for its food?
436. What is the process of intake of nutrients by an organism as well as the utilisation of these nutrients by the organisms called?
437. What is the process of taking food into the body called?
438. What is the reason behind the small shrunken scrotal of an adult bulls straying on Delhi roads?
439. What is the shedding of flowers, leaves and fruits followed by formation of scar tissue in a plant called?
440. What is the total number of permanent incisors in both the upper and lower jaws of the cattle and buffaloes?
441. What is the weight of human heart?
442. What makes a reptile a reptile?
443. What part of the Quinine plant is commonly used drug for Malaria?
444. What proportion of children is likely to be colour blindness when their parent (mother has normal vision & father has colour-blindness)?
445. What types of nitrogenous wastes are excreted by living organisms?
446. What will be the ratio of oxygen produced to that of consumed in daylight hours when the rate of respiration is less than that of photosynthesis?
447. When an organism obtains its food from decaying organic matter of dead plants, dead animals and rotten bread, etc., it is called:
448. When blood is forced into the artery, wave like expansion takes place is called:
449. When new plants are obtained from the parts of old plants, without the help of any reproductive organs, it is called:
450. When the cut stems of two different plants are joined together in such a way that the two stems join and grow as a single plant, it is called: