CBSE Class 11 Biology Morphology of Flowering Plants Worksheet Set A

Question. Perisperm is
(a) remnant of endosperm
(b) persistant nucellus
(c) remnant of embryo
(d) part of endosperm
Answer. B

Question. Aggregate fruit develops from 
(a) syncarpous ovary
(b) multicarpellary, syncarpous ovary
(c) unilocular ovary
(d) multicarpellary, apocarpous ovary
Answer. D

Question. The presence of cilia, an oral groove, and food vacuoles, and the absence of chloroplasts in a unicellular organism indicate that the organism carries on 
(a) sexual reproduction
(b) autotrophic nutrition
(c) extracellular digestion
(d) heterotrophic nutrition
Answer. D

Question. In moss capsule, the number of peristome whorls are 
(a) 1
(b) 2
(c) 3
(d) 4
Answer. B

Question. Most reduced form of stem is found in 
(a) bulb
(b) rhizome
(c) tree
(d) stem
Answer. A

Question. In Opuntia, spines are modification of 
(a) stem
(b) root
(c) leaf
(d) flower
Answer. C

Question. Match the following-
   List-I                         List-II
A. Coleorhiza         I. Development of sporophyte directly from gametophyte
                                  without intervention of gametes
B. Apogamy          II. Development of gametophyte directly from sporophyte
                                 without the involvement of reduction division.
C. Indusium          III. An unbranched columnar stem with a crown of leaves.
D. Caudex            IV. Protective covering of radicle
                              V. Protective structure of a sorus. 
(a) A – V; B – II; C – IV; D – I
(b) A – IV; B – I; C – V; D – III
(c) A – III; B – V; C – II; D – IV
(d) A – II; B – III; C – I; D – V
Answer. B

ASSERTION REASON QUESTIONS

Directions : Each of these questions contains an Assertion followed by Reason. Read them carefully and answer the question on the basis of following options. You have to select the one that best describes the two statements.
(a) If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
(b) If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
(c) If Assertion is correct but Reason is incorrect.
(d) If both the Assertion and Reason are incorrect.

Question. Assertion : In fabaceae family monocarpellary, unilocular ovary is present. 
Reason : In fabaceae, placentation is parietal.
Answer. C

Question. Assertion : Apical meristem of root is subterminal.
Reason : At the terminal end of root, root cap is present.
Answer. A

Question. Assertion : A simple leaf has undivided lamina.
Reason : Leaves showing pinnate and palmate venation have various types of incisions.
Answer. B

 

 

 

Answer. The types of the placentation are: marginal, axile, parietal, free central and basal.

 

Answer. Katherine Esau wrote the Anatomy of Seed Plants.

 

Answer. A side branch of the main root is called secondary root or lateral root.

 

Answer. The direct elongation of the radicle leads to the formation of the primary root.

 

Answer. The root is covered at the apex by a thimble like structure is called root cap.