What is Ecotone ? An ecotone is a transition zone between two ecosystems or biomes. It is the area where the distribution of plant and animal species changes as one ecosystem gives way to another. Ecotones can occur at a variety of scales, from the boundary between a forest and a grassland, to the interface between a coral reef and the open ocean. These transition zones are often highly biodiverse, as they provide a variety of different habitats for different species. Ecotones are also known to play an important role in the functioning of ecosystems and are often considered keystone features in conservation and management. Characteristic of Ecotone Ecotones have several characteristics that distinguish them from the ecosystems on either side of the transition zone. Some of these include: 1. Biodiversity : Ecotones tend to have a higher diversity of plant and animal species than the ecosystems they connect. This is because ecotones provide a range of different habitats that...

Active And Passive Voice Question no. 1 Sachin answered my questions. looks_one My questions were answered by Sachin. looks_two My questions had answered by Sachin. looks_3 My questions had been answered by Sachin. looks_4 My questions were being answered by Sachin. Question no. 2 Everybody supported the proposal. looks_one The proposal had supported by everybody. looks_two The proposal had been supported by everybody. looks_3 The proposal was supported by everybody. looks_4 None of these Question no. 3 What happened proved my point. looks_one My point had proved by what happened. looks_two My point were proved by what happened. looks_3 My point had been proved by what happened. looks_4 My point was proved by what happened. Question no. 4 Your medicine firm represents the union. looks_one The union is represented by your medicine firm. looks_two The union was represented by your medicine firm...

Progression Question no. 1 What is equal to ? looks_one n+2 C 1 looks_two n+2 C n looks_3 n+3 C n looks_4 n+2 C n+1 Answer Option looks_one n+2 C 1 Solution Solution : Question no. 2 What is the sum of coefficients in the expansion of (1+x) n ? looks_one 2 n looks_two 2 n - 1 looks_3 2 n + 1 looks_4 (n+1) Answer Option looks_one 2 n Solution Solution : (1 + x) n = n C 0 + n C 1 x + n C 2 x 2 + ........ + n C n x n put x = 1 2 n = n C 0 + n C 1 + n C 2 + ........ + n C n sum of coefficient = n C 0 + n C 1 + n C 2 + ........ + n C n = 2 n Question no. 3 The value of the term independent of x in the expansion of is looks_one 9 looks_two 18 looks_3 48 looks_4 84 Answer Option looks_4 84 Solution Solution : T r+1 = n C r (x 2 ) n-r (-1/x) r = n C r (x) 2n-2r-r (-1) r = n C r (x) 2n-3r (-1) r For independent of x : 2n -3r = 0 3r = 2 *9 r...

Vector Question no. 16 If a , b and c are three coplanar vector , then looks_one a .( b ✕ c )=1 looks_two a .( b ✕ c )= 3 looks_3 c .( a ✕ b )=0 looks_4 b .( c ✕ a )=1 Answer Option looks_3 c .( a ✕ b )=0 Solution Solution : If a , b and c are three coplanar vector c .( a ✕ b )=0 Question no. 17 Given a = i + j - k and b= - i + 2 j + k , c= - i + 2 j - k . A unit vector prependicular to both a + b and c + b looks_one i looks_two j looks_3 k looks_4 ( i + j + k )/√3 Answer Option looks_3 k Solution Solution : a = i + j - k b= - i + 2 j + k c= - i + 2 j - k a + b = 3 j c + b = -2 i + 4 j A unit vector prependicular to both a + b and c + b is cross product of both vector. Unit Vector = k Question no. 18 For any vector a and b ,if a ✕ b =0 and a . b =0 then looks_one a is parallel to...