Plant Tissues

Question 1

Lateral meristems are seen in plants that produce the

Answer 1

woody axis or show secondary growth

Question 2

apical cell theory by

Answer 2

hofmeister and nageli

Question 3

Histogen theory by

Answer 3

Hanstein

Question 4

Tunica-corpus theory given by

Answer 4

Schmidt

Question 5

Korper Kappa Theory given by

Answer 5

Schuepp

Question 6

Cells which are isodiametric

Answer 6

Parenchyma,closely packed with no intercellular spaces

Question 7

lignin is contained in the cell wall of

Answer 7

sclerenchyma,which contains several pits

Question 8

gritty texture of guava is due to presence of

Answer 8

scleroids

Question 9

Endarch

Answer 9

Protoxylem Lies in the center(the young one)

Question 10

secondary xylem is formed by

Answer 10

vascular cambial ring

Question 11

Cells having Tapering Ends

Answer 11

Tracheids,xylem fibres,phloem fibres

Question 12

oblique end walls and presence of perforation plates are found in

Answer 12

vessels.

Question 13

vessels are absent in

Answer 13

Gymnosperms and Pteridophytes,ancient families like tetracentraceae,Trochodendraceae,Winteraceae

Question 14

structural diff between tracheid and vessel

Answer 14

Vessel consists of several cells whose walls are eventually dissolved whereas tracheid consists of a single cell

Question 15

Helps in Radial conduction of water

Answer 15

Xylem Parenchyma,they are also known as ray parenchyma

Question 16

Sieve tubes absent in

Answer 16

pteridophytes and gymnosperms,have sieve cells immature in angiosperms

Question 17

sieve cells have plates on the

Answer 17

Lateral side of the wall

Question 18

companion cells are found in

Answer 18

Angiosperms only

Question 19

Helps in maintaining Pressure gradient

Answer 19

companion cells,gymnosperms have albuminous cells

Question 20

Component of phloem absent in monocots

Answer 20

Phloem Parenchyma

Question 21

quiescent cell theory given by

Answer 21

Clowes

Question 22

absent in primary phloem but present in secondary phloem

Answer 22

phloem fibres