4291: A spherical body moves with a uniform angular velocity around a circular path of radius r. Which one of the following statements is correct?
(a) The body has no acceleration
(b) The body has a radial acceleration 2r directed towards the centre of the path.
(c) The body has a radial acceleration 2/5 2r directed away from the centre of the path.
(d) The body has an acceleration 2r tangential to its path
4292: A state in India has the following characteristics:
1. Its northern part is arid and semi arid.
2. Its central part produces cotton.
3. Cultivation of cash crops is predominant over food crops.
Which one of the following states has all of the above characteristics ?
(a) Tamil Nadu
(b) Gujarat
(c) Andhra Pradesh
(d) Karnataka
4293: What is the name of the vessel that delivers the nutrient rich blood from the stomach & small intestine to the liver ?
(a) Left hepatic artery
(b) Hepatic portal vein
(c) Right hepatic artery
(d) Hepatic vein
4294: Who among the following discovered heavy water?
(a) Joseph Priestley
(b) Heinrich Hertz
(c) H. C. Urey
(d) G. Mendel
4295: Consider the following techniques/phenomena:
1. Budding and grafting in fruit plants
2. Cytoplasmic male sterility
3. Gene silencing
Which of the above is/are used to create transgenic crops?
(a) 1 only
(b) 2 and 3
(c) 1 and 3
(d) None