NEET UG Botany-139

Question No:1

(A): Maize contains protoxylem cavity.
(R): Protoxylem cavity in maize is formed schizogenously.

(A) Both ( A ) and (R) are true and (R) is the correct explanation of ( A )
(B) Both (A) and (R) are true and (R) is not the correct explanation of (A)
(C) (A) is true but (R) is false.
(D) Both (A) are (R) wrong.

Question No:2

(A): Vascular cambium is produced by secondary tissues in monocot root
(R): It arises between the primary xylem and primary phloem of monocot root

(A) Both ( A ) and (R) are true and (R) is the correct explanation of ( A )
(B) Both (A) and (R) are true and (R) is not the correct explanation of (A)
(C) (A) is true but (R) is false.
(D) Both (A) are (R) wrong.

Question No:3

(A): Interfascicular cambium originates from the cells of medullary rays.
(R): Titerfascicular cambium occur as strips in vascular bundles.

(A) Both ( A ) and (R) are true and (R) is the correct explanation of ( A )
(B) Both (A) and (R) are true and (R) is not the correct explanation of (A)
(C) (A) is true but (R) is false.
(D) Both (A) are (R) wrong.

Question No:4

(A) : Annual rings are not produced in secondary phleom.
(R): Secondary phloem does not grow in thickness.

(A) Both ( A ) and (R) are true and (R) is the correct explanation of ( A )
(B) Both (A) and (R) are true and (R) is not the correct explanation of (A)
(C) (A) is true but (R) is false.
(D) Both (A) are (R) wrong.

Question No:5

(A): Annual rings are common in temperate trees.
(R): Trees in temperature climate experience a great variation in the climate.

(A) Both ( A ) and (R) are true and (R) is the correct explanation of ( A )
(B) Both (A) and (R) are true and (R) is not the correct explanation of (A)
(C) (A) is true but (R) is false.
(D) Both (A) are (R) wrong.

Question No:6

(A): Both spring and autumn ring contributes equally to the growth ring.
(R): Both rings are formed in half year only

(A) Both ( A ) and (R) are true and (R) is the correct explanation of ( A )
(B) Both (A) and (R) are true and (R) is not the correct explanation of (A)
(C) (A) is true but (R) is false.
(D) Both (A) are (R) wrong.

Question No:7

(A): Tyloses plug the tracheids and vessels.
(R): Tyloses are in growth of xylem cells.

(A) Both ( A ) and (R) are true and (R) is the correct explanation of ( A )
(B) Both (A) and (R) are true and (R) is not the correct explanation of (A)
(C) (A) is true but (R) is false.
(D) Both (A) are (R) wrong.

Question No:8

(A): Cork protects plants from microbial attack
(R): Cork cells are filled with air

(A) Both ( A ) and (R) are true and (R) is the correct explanation of ( A )
(B) Both (A) and (R) are true and (R) is not the correct explanation of (A)
(C) (A) is true but (R) is false.
(D) Both (A) are (R) wrong.

Question No:9

The lenticel is meant for gaseous exchange.
(R): Lenticel checks excessive evaporation of water.

(A) Both ( A ) and (R) are true and (R) is the correct explanation of ( A )
(B) Both (A) and (R) are true and (R) is not the correct explanation of (A)
(C) (A) is true but (R) is false.
(D) Both (A) are (R) wrong.

Question No:10

Some arborescent monocdts show secondary growth
A secondary cambium grows in hypodermal region.

(A) Both ( A ) and (R) are true and (R) is the correct explanation of ( A )
(B) Both (A) and (R) are true and (R) is not the correct explanation of (A)
(C) (A) is true but (R) is false.
(D) Both (A) are (R) wrong.

Question No:11

(A): Cork prevents the loss of water by evaporation
(R): Cork cells contain tannins

(A) Both ( A ) and (R) are true and (R) is the correct explanation of ( A )
(B) Both (A) and (R) are true and (R) is not the correct explanation of (A)
(C) (A) is true but (R) is false.
(D) Both (A) are (R) wrong.

Question No:12

As a tree grows older, which of the following increases more rapidly in thickness?

(A) heart wood
(B) sap wood
(C) phloem
(D) cortex

Question No:13

At maturity, which of the following is non-nucleated?

(A) palisade cell
(B) cortical cell
(C) sieve cell
(D) companion cell

Question No:14

Casparian strips are found in

(A) epidermis
(B) hypodermis
(C) periderm
(D) endodermis

Question No:15

Main function of lenticel is

(A) transpiration
(B) guttation
(C) gaseous exchange
(D) bleeding

Question No:16

Vessels are found in

(A) all angiosperms and some gymnosperms
(B) most of angiosperms and few gymnosperms
(C) all angiosperms all gymnosperms and some pteriodophyta
(D) all pteridophyta

Question No:17

Axillary bud and terminal bud derived from the activity of

(A) lateral meristem
(B) intercalary meristern
(C) apical meristem
(D) parenchyma

Question No:18

The cells of the quiescent centre are characterised

(A) having dense cytoplasm and prominent nuclei
(B) having light cytoplasm and small nuclei
(C) dividing regularly to add to the corpus
(D) dividing regularly to add to tunica

Question No:19

The apical meristem of the root is present

(A) only in radicals
(B) only in tap roots
(C) only in adventitious roots
(D) in all the roots

Question No:20

In a longitudinal section of a root, starting from the tip upward, the four zones occur in the following order

(A) root cap, cell division, cell enlargement, cell maturation
(B) root cap, cell division, cell maturation, cell enlargement
(C) cell division, cell enlargement, cell maturation, root cap
(D) cell division, cell maturation, cell enlargement, root cap.