The given graph shows Raju's pulse rate. Which of the following is the
most probable condition during which pulse rate was recorded?
A Raju ran for 10 minutes, rested for 10 minutes and ran again.
B Raju did warm up exercise for 10 minutes, rested for 20 minutes and ran again.
C Raju slept for 1 hour, walked for 1 hour and slept again.
D Raju walked for 1 hour, rested for half an hour and walked again.
Which of the following statements is correct?
A Digestion of carbohydrates starts in stomach.
B The process of taking in carbon dioxide and giving out oxygen is called respiration.
C In a normal man, at rest, heart beats 75 times per minute.
D Skin is the largest sense organ of our body.
Refer the given figure of human digestive system and select the option which correctly answer the questions that follow.
i The inner lining of which of the labelled parts secretes mucus and hydrochloric acid?
ii Juice secreted from which of the labelled parts breaks down fats completely into fatty acids and glycerol?
iii The food that remains undigested and unabsorbed passes into which of the labelled parts?
A i - P, ii - Q, iii - S
B i - P, ii - R, iii - S
C i - R, ii - P, iii - Q
D i - Q, ii - R, iii - P
A Predators may have been introduced into Tank P in April.
B All the guppies in Tank S could have been either male or female only.
C There were more guppies born in April in Tank R than Tank Q.
D The death rates of guppies in Tank P and Tank R in April were greater than the birth rates.
The diagram below shows the cross-section of a stem
of a plant.
What will you observe when the plant stem is cut after being submerged in blue dye for a day?
A Part P is stained blue
B Part Q is stained blue
C Part R is stained blue
D Part S is stained blue
There are two mixtures P and Q with the following
The components of P mixture are separated by technique I while for Q mixture, technique II is used as shown in the figures.
Select the correct statement among the following.
A If more of X is dissolved in Y, then a saturated solution is formed.
B Z and Y can also be separated by sedimentation and decantation.
C Y is a common solid particle in both the mixtures.
D If a mixture of X and Z is formed, then more than one method is used to separate the components.