Question

Different respiratory organs are present in different organisms .X is main respiratory organ in human respiratory system of Cockroach concept of small opening on the sides of its body call tracheoles which are connected to the tubes called tracheae that are further branched into spiracles.Scolidon 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 cells called guard cells.

Q1) Identify X,Y and Z in the given passage and select the incorrect option regarding them.

A)Whales and dolphins also have X as their respiratory organ where alveoli is the main site of gaseous exchange.

B)Y is the respiratory organ in tadpole larva and sea horse.

C)Z is absent in all hydrophytes but in abundantly present on the upper leaf surface of all xerophytes.

D) When pressure inside X drops, inspiration occurs and when pressure inside X starts increasing the air contained in it is pushed out causing expiration.

Q2)Select the correct option regarding the words italicised in the given passage.

A)The positions of spiracles and tracheoles should be interchanged.

B)The positions of tracheoles and tracheae should be interchanged.

C) Subsidiary should not be replaced as it is correctly mentioned.

D) Guard should be replaced by lenticel.

Answer 1

Z is absent in all hydrophytes but it abundantly present on the upper leaf surface of all Xerophyte.

Z is mainly guarded with two kidney shaped subsidiary cells that are further flanked with the specialised epidermal cells called guard cells.

Guard also be replaced by lenticels and positions of spiracles and tracheoles are interchanged.

Answer 2

Q1) Identify X,Y and Z in the given passage and select the incorrect option regarding them. ANSWER:

X= LUNGS Y= TRACHEAE Z= GILLS.

The respiratory system is basically a system which consists of certain organs which are designed to perform the task of respiration where extraction of oxygen is taking place in the lungs or any other respiratory organs and this oxygen is used by various body parts.