Home
Class 11
BIOLOGY
Which ones among the following are corec...

Which ones among the following are corect?
(a)Uneven thickening of cell wll is characteristic of sclerenchyma
(b)periblem forms acortex of stem and root
(c )Tracheids are chief water conduting elements in gymnosperms
(d) Commerical cork is obtained from quercus suber

A

b,c

B

a,d

C

b,e

D

c,d

Text Solution

Verified by Experts

The correct Answer is:
A

Uneven thickening of cell wall is characteristic of collenchyma.
Siveve tube is devoid of nucleus at maturity.
Promotional Banner

Topper's Solved these Questions

  • ANATOMY OF FLOWERING PLANTS

    A2Z|Exercise Section C : Previous Years' Examination Question (Assertion-Resaoning Type Question)|9 Videos
  • ANIMAL KINGDOM

    A2Z|Exercise Section D : Chapter End Test|50 Videos

Similar Questions

Explore conceptually related problems

Which of the following statements is /are true Uneven thickening of cell wall is characteristic of sclerenchyma (B) Periblem forms the cortex of the stem and the root (C) Tracheids are the chief wate transporting elements in gymnosperms (D)Companion cell is devoid of nucleous at maturity (E) The Commercial cork is obtained from Quercus suber

The students of class IX have made placards showing the symbols of some elements and valencies of these elements. These placards somehow got mixed up as shown below : On this basis of these placards the chemistry teacher, Mrs. Shanti, asked a student Vikas to answer the following questions : (a) Choose the symbol of an element from among the placards which exhibits valencies of 3 and 5. What is the name of is the name of this element ? Is it a metal or a non-metal ? (b) Choose the symbol of an element from the given placards which shows a valency of 2. What is the name of this element ? Is it a metal or a non-metal ? (c) Work out the formula of the compound formed between the element of valency 3 and element of valency 2. Also name this compound (d) What values are displayed by Vikas in this episode ?

Consider the following four statements (a-d) and select the option which includes all the correct ones only: a) B-lymphocytes forms cellular barrier of innate immunity. b) HLA antigens are called as transplantation antigens c) Subsequent encounter with the same pathogen elicits a highly intensified anamnestic response. d) Interferons protect non-infected cells from further viral infection.

Small brands are now looking beyond local grocery stores and are tying up with Supermarkets such as Big Bazaar to pull their business out of troubled waters. Which of the following can be inferred from the given information ? (An inference is something that is not directly stated but can be inferred from the given information) (a) Merchandise of smaller brands would not be available at local grocery stores in the near future. (b) Smaller brands cannot compete with bigger ones in a supermarket set-up. (c) There is a perception among small brands that sale in a supermarket is higher than that of small grocery stores. (d) Supermarkets generate more revenue by selling products of bigger brands as compared to the smaller ones.