Refer to the given Venn diagram and select the incorrect statement regarding animals X, Y and Z.
ABoth X and Z can regulate their body temperatures but X is oviparous and Z is viviparous.
BY may have an exoskeleton of scales and its body is divisible into head, trunk and tail.
CX could be stork, Y could be arowana and Z could be dolphin.
DX has hollow bones and Y respires through moist skin and buccopharyngeal cavity.
Ronit, a class 8 student took 20 mL of dilute HCl in four different flasks. He added 10 mL of pure water to flask I, 20 mL of pure water to flask II, 20 mL of solution of dilute HCl to flask IV. pH of the solution will not change in
The diagram shows identical lamps X and Y connected in series with a battery. The lamps light with normal
brightness. If a third identical lamp Z is connected in parallel with lamp X, then what will happen to the brightness of lamp Y?
ABrighter than normal
CDimmer than normal
DVery dim (cannot be seen)
The length of a pencil is measured using a ruler as shown in the given figure. What is the apparent length of the pencil seen by the observer and the actual length of the pencil?
Apparent length ------ Actual length
A42 mm -------- 40 mm
B5 mm -------- 10 mm
C37 mm -------- 30 mm
D37 mm -------- 40 mm