Water vascular system is the characteristic of which group of the following :a/ Porifera b/ ctenophora c/Echinodermata d/Chordata

Water vascular system is the characteristic of which group of the following : Ctenophora

Water vascular system is the characteristic of which group of the following : Echinodermata

Identify 'A', 'B', 'C', 'D' from the following:

Segmentation in the body is first observed in which of the following: a/ Ashelminthes b/Annelida c/Arthropoda d/ Platyhelminthes

The LCM of two numbers is 1200 which of the following cannot be their HCF? a)600 b)500 c)400 d)200

A monkey of mass 40 kg climbs on a rope (Fig. 5.20) which can stand a maximum tension of 600 N. In which of the following cases will the rope break: the monkey (a) climbs up with an acceleration of 6 m s^2 (b) climbs down with an acceleration of 4 m s^2 (c) climbs up with a uniform speed of 5 m s^1 (d) falls down the rope nearly freely under gravity? (Ignore the mass of the rope).

If in Exercise 5.21, the speed of the stone is increased beyond the maximum permissible value, and the string breaks suddenly, which of the following correctly describes the trajectory of the stone after the string breaks: (a) the stone moves radially outwards, (b) the stone flies off tangentially from the instant the string breaks, (c) the stone flies off at an angle with the tangent whose magnitude depends on the speed of the particle?

Which of the following pairs of sets are disjoint?C={a,e,i,o,u},D={c,d,e,f}.

Given a + b + c + d = 0, which of the following statements are correct: 'a, b, c, and d must each be a null vector,

If a,b,c,d are in G.P show that each of the following three term are also in G.P a+b,b+c,c+d .