Cook cambium and vascular cambium are :

• parts of secondary xylem and phloem

• parts of pericycle

• lateral meristems

• apical meristems

Phytotron is :

• a controlled condition chamber for tissue

• leaf culture process

• special culture of plants

• root culture process

P-proteins belong to :

• xylem parenchyma

• trichomes

• sieve tube elements

• tracheids and vessels

124.

Largest number of chloroplast is found in :

• palisade tissue

• spongy tissue

• transfusion tissue

• bundle sheath cells

Growth rings are formed due to activity of :

• extrastelar cambium

• intrastelar cambium

• interstelar cambium

• both 'b' and 'c'

Passage cells are found in

• dicot stem

• monocot root

• monocot stem

• all of these

Porous wood has abundance of 

• vessels

• fibres only

• tracheids

• sieve tubes

Velamen is a specialized tissue found in

• aerial roots of orchids

• succulent leaves

• pneumatophores

• stilt roots

Assertion : Monocot stem bears collateral open vascular bundles.

Reason : If cambium is absent such vascular bundles are called closed type.

• If both Assertion and Reason are true and Reason is the correct explantion of Assertion

• If both Assertion and Reason are true and Reason is not the correct explanation of Assertion

• If Assertion is true but Reason is false

• If Assertion is false but Reason is true.

Which of the following characters are not applicable to the anatomy of dicot stem and choose the correct options given below.

(A) Collenchymatous hypodermis

(B) Polyarch xylem

(C) Presence of casparian strips on the endodermis

(D) Open vascular bundle

(E) Presence of medullary rays

• (A), (D) and (E) only

• (B) and (C) only

• (B) and (E) only

• (A), (B) and (C) only

• (A), (B) and (C) only