CBSE Class 11 Biology Anatomy of Flowering Plants Worksheet Set A

Question. Contractile tissues have the following features
(i) Mesodermal in origin
(ii) They contain stretch receptors.
(iii) Rhythmic contractions are seen in them
(iv) They do not fatigue during the life of the animal Which of the above are characteristics of sphincters?
(a) All the four
(b) Only (i), (ii) and (iii)
(c) Only (i), (ii) and (iv)
(d) Only (i), (iii) and (iv)
Answer. B

Question. T.S. of dicot leaf passing through the midrib is given below, certain parts have been indicated by alphabets. Choose the correct option.

(a) A – Epidermis, B – Spongy parenchyma,C – Palisade parenchyma, D – Stomata, E –Guard cells, F – Phloem, G – Metaxylem, H– Protoxylem
(b) A – Epidermis, B – Palisade parenchyma,C – Spongy parenchyma, D – Sub-stomatalcavity, E – Stoma, F – Phloem, G –Metaxylem, H – Bundle sheath
(c) A – Epidermis, B – Palisade parenchyma,C – Spongy parenchyma, D – Stomata, E –Guard cells, F – Epidermis, G – Xylem, H –Phloem
(d) A – Epidermis, C – Palisade parenchyma,C – Spongy parenchyma, D – Stomata, E –Guard cells, F – Phloem, G – Metaxylem, H– Protoxylem
Answer. B

ASSERTION REASON QUESTIONS

Directions : These questions consist of two statements, each printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following five responses.
(a) If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
(b) If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
(c) If the Assertion is correct but Reason is incorrect.
(d) If both the Assertion and Reason are incorrect.
(e) If the Assertion is incorrect but the Reason is correct.

Question. Assertion : Thick cuticle is mostly present in disease resistant plants.
Reason : Disease causing agents cannot grow on cuticle and cannot invade the cuticle.
Answer. E

Question. Assertion: Cambium is a lateral meristem and cause growth in width.
Reason: Cambium is made up of fusiform and ray initials in stem. 
Answer. B

Question. Assertion : Higher plants have meristematic regions for indefinite growth.
Reason : Higher plants have root and shoot apices. 
Answer. A

Question.Assertion : In collateral vascular bundles, phloem is situated towards inner side.
Reason : In monocot stem, cambium is present.
Answer. D

Question. Assertion : Collenchyma is thick walled dead tissue.
Reason : Collenchymatous cells show thickenings of pectin. 
Answer. E

Question. Assertion: The two cotyledons in seed are embryonic leaves.
Reason: The embryo contains radicle and plumule. 
Answer. B

Question. Assertion : In angiosperms, the conduction of water is more efficient because their xylem has vessels. 
Reason : Conduction of water by vessel elements is an active process with energy supplied by xylem parenchyma rich in mitochondria.
Answer. D

Question. Assertion : In woody stems, the amount of heart wood continues to increase year after year.
Reason : The cambial activity continues uninterrupted. 
Answer. A

Question. Assertion : Petroplants produce large amount of latex.
Reason : The latex contains long chain hydrocarbons. 
Answer. A