441: Ultrafiltering units of kidney are known as:
(a) Nephron
(b) Glomerulus
(c) Vena Cava
(d) Tubule
442: Zero was invented by
(a) Aryabhata
(b) Varahamihira
(c) Bhaskara I
(d) an unknown Indian
443: In a class there are 18 boys who are over 160 cm tall. If these boys constitute three-fourths of the boys and the total number of boys is two-third of the number of students in the class, then what is the number of girls in the class?
(a) 6
(b) 12
(c) 18
(d) 24
444: The number of economically active women (excluding students and those doing domestic duties in their homes) as a percentage of all women of working age (generally those aged 15-64 years) was the highest in 1996 in
(a) USA
(b) China
(c) Russia
(d) S. Korea
445: Consider the following statements :
The Ministerial Meeting of the WTO held in December 1999 was unsuccessful because it attempted to link trade with
I. labour related issues.
II. environment related issues.
III. terrorism related issues.
IV. debt-related issues.
Which of these statements are correct ?
(a) I, III and IV
(b) I and II
(c) II and III
(d) II and IV