0

Guest

Courses New

51. Give reasons for : (i) Meristematic cells have a prominent nucleus and dense cytoplasm but they lack vacuole. (ii) Intercellular spaces are absent in sclerenchymatous tissues. (iii) We get a crunchy and granular feeling, when we chew pear fruit. (iv) Branches of a tree move and bend freely in high wind velocity. (v) It is difficult to pull out the husk of a coconut tree.

51. Give reasons for :
(i) Meristematic cells have a prominent nucleus and dense cytoplasm but they lack vacuole.
(ii) Intercellular spaces are absent in sclerenchymatous tissues.
(iii) We get a crunchy and granular feeling, when we chew pear fruit.
(iv) Branches of a tree move and bend freely in high wind velocity.
(v) It is difficult to pull out the husk of a coconut tree.

Grade:12th pass

1 Answers

Pawan Prajapati
askIITians Faculty 60787 Points
3 years ago
(i) Meristematic cells have a prominent nucleus and dense cytoplasm but they lack vacuole because the meristimatic cell undergoes cell division and have no requirement to store food. (ii) Intercellular spaces are absent in sclerenchymatous tissues because the walls have lignin deposition which provides mechanical strength. (iii) We get a crunchy and granular feeling, when we chew pear fruit because the fruit contains stone cells commonly known as sclereids (sclerenchyma). (iv) Branches of a tree move and bend freely in high wind velocity because the presence of collenchyma adds the property of flexibility. (v) It is difficult to pull out the husk of a coconut tree because it is composed of sclerenchyma fibres which are very closely packed.

Think You Can Provide A Better Answer ?

Other Related Questions on 9 grade science

View all Questions »

ASK QUESTION

Get your questions answered by the expert for free

Answer and earn gift vouchers

Win Gift vouchers upto Rs 500/-

View courses by askIITians

Design classes One-on-One in your own way with Top IITians/Medical Professionals

Click Here Know More

Complete Self Study Package designed by Industry Leading Experts

Click Here Know More

Live 1-1 coding classes to unleash the Creator in your Child

Click Here Know More

a Complete All-in-One Study package Fully Loaded inside a Tablet!

Click Here Know More