Q.20. Formation of secondary xylem and phloem respectively

1. Centrifugal and centripetal
2. Centripetal and centrifugal
3. Both centripetal
4. Both centrifugal

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Anatomy Of Flowering Plants : Biology (Class 11th) Revision Test | MCQs For NEET

25 Questions 1 Attempts 8.2K Seen

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Action	Q.No.	Que title	Option 1 (a)	Option 2 (b)	Option 3 (c)	Option 4 (d)
	1	Quiescent centre is present in the	apical meristem	shoot meristem	lateral meristem	root meristem
	2	Closed vascular bundles lacks	pith	xylem	cambium	xylem vessels
	3	Which of the following is not a feature of spring wood?	Color of the wood is light.	Density is less.	Cambium is active.	Lesser number of xylary elements.
	4	In a monocot leaf	bulliform cells are absent from the eqidermis	veins from a network	mesophyll is well differentiated into palisade and spongy parenchyma	mesophyll is not differentiated into palisade and spongy parenchyma
	5	A.T.S. of a young dicot root can be distinguished from that of a young dicot stem by the presence of	radial arrangement of xylem and phloem	collateral arrangement of xylem and phloem	interfascicular cambium	intrafascicular cambium
	6	Fusifrom initial cells of cambium from	vascular rays	tracheary elements	ray parenchyma	phloem parenchyma
	7	Callose deposition is found in	tracheids	companion cells	sieve areas	phloem parenchyma
	8	Stem develops from	radicle	cotyledon	mesocarp	plumule
	9	Stem grows in girth due to	outer cortical	epidermis	vascular cambium	phellogen
	10	Which of the following is true about heartwood?	They are dead but gives mechanical support to stem	They are light in color	They conduct water and minerals.	1 and 3
	11	Pith is very well developed in	monocot root and monocot stem	monocot root and dicot root	dicot root and monocot stem	monocot root and dicot stem
	12	Which of the following helps in the curling of the leaf surface?	Bulliform cells	Xylem tissue	Palisade parenchyma	Bundle sheath cells
	13	Walls of sclerenchyma are	rigid	lignified	pectinised	suberised
	14	Fusifrom initial cells of cambium from	vascular rays	tracheary elements	ray parenchyma	phloem parenchyma
	15	Closed vascular bundles lacks	pith	xylem	cambium	xylem vessels
	16	After the secondary growth, the oldest layer of secondary phloem in a dicot stem is located	just outside the vascular cambium	just inside the vascular cambium	just inside the vascular phloem	just outside the secondary xylem
	17	The innermost layer of cortex which shows casparian thickenings in its cells is called as	epidermis	endodermis	pericycle	exodermis
	18	Vessels differ from tracheids	in being living	in being derived from a single cell	in that they consist of vertical row of cells with cross walls dissolved	in coducting water and minerals
	19	Endodermis cells are rich in	cellulose	starch grains	fibers	resins and wax
	20	Formation of secondary xylem and phloem respectively	Centrifugal and centripetal	Centripetal and centrifugal	Both centripetal	Both centrifugal
	21	Bark includes all the tissues	Lying outside the vascular cambium	Formed by vascular cambium	Formed by phellogen	Phellem & phelloderm
	22	Living tissue in lenticel is called	Conjunctive tissue	Connective tissue	Complementary tissue	Phelloderm
	23	Which among the following are elongated or tube like cells with thick and lignified walls and tapering ends?	Xylem fibres	Xylem parenchyma	vessels	Tracheids
	24	Which of the following provide maximum mechanical strength to a tree trunk.	Heart wood	Sap wood	Cork	Late wood
	25	Vessels and companion cells are respectively present in the xylem and phloem of	Gymnosperm	Pteridophytes	Angiosperm	Bryophyta

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