Read the given passage having some variables and few italicised words. Different respiratory organs are present in different organisms. X is the main respiratory organ in humans. Respiratory system of cockroach consists of small openings on the sides of its body called tracheoles which are connected to the tubes called tracheae that are further branched into spiracles. Scoliodon respires through Y which is richly supplied with blood vessels. Z is the main site of gaseous exchange in plants. Each Z is guarded by two kidney shaped subsidiary cells which are further flanked by specialised epidermal cells called guard cells.
Select the correct option regarding the words italicised in the given passage.
AThe positions of spiracles and tracheoles should be interchanged.
BThe position of tracheoles and tracheae should be interchanged.
CSubsidiary should not be replaced as it is correctly mentioned.
DGuard should be replaced by lenticel.
No words are italicised in this. How do you expect us to write answers when you make errors?
A burning candle was put in a glass jar containing a gas X and opening of glass jar was sealed with lid. The candle flame put off. The gas X could be ________.
DBoth A and C
I think oxygen is essential for burning
Study the given Venn diagram and select the position where Moon can be placed in this diagram.
Ravi performed an experiment as shown in the given figure.
Select the correct statement regarding it.
A He did not applied vaseline on all the leaves.
B He applied vaseline as he wants to study transpiration in plants.
C He kept plant in sunlight because higher temperature favours transpiration.
D All of these
The correct answer is D
Which of the labelled areas in the Venn diagram represents the small intestine?
Complete digestion of food takes place in small intestine. Also absorption of the digested food into the blood takes place in small intestine.