Select the INCORRECT statement.
AThe nest of a weaver bird has a tunnel-like opening at the bottom.
BWoodpecker makes its nest in a hole in tree trunk which it pecks with its beak.
CPenguin makes its nest on the ground.
DKoel makes its nest among the thorns of a cactus plant.
In given diagram, an iron cube is heated and placed in a tank of water at room temperature.
Which graph shows the correct change in temperature of the water in the tank over a period of time?
A wave travels through a medium with a speed of 340 m s-1. If the frequency of the wave is doubled, what happens to the wave speed and wavelength?
ARemains constant, doubles
BDoubles, reduced by a factor of two
CRemains constant, reduced by a factor of two
DReduced by a factor of two, remains constant
Which of the following statements is the drawback of the green revolution?
AExcessive use of chemical fertilizers, pesticides, etc. resulted in air, soil and water pollution.
BMore requirement of water by high yielding crops resulted in the depletion of underground water resources.
CUse of agrochemicals was an expensive measure for Indian farmers.
DAll of these
ANSWER MUST BE D
Jagan is eighth from the bottom and fourteenth from the top. There are fifteen boys between the first student and the last student. How many girls are there?
C Data inadequate
D None of these
Ten male animals each of type X and Y were living together for few months in captivity in a well defined area (full of greenery). Other types of animals were not present in this area. Then an animal Z was introduced in this area. After few days, their numbers were counted as shown here.
A Z is a carnivore.
B Y is a herbivore.
C X is a herbivore.
D All of these