Correct Order of Woody Dicot Stem Layers

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Identifying the proper sequence of layers in a woody dicot stem is crucial for understanding plant anatomy. In this instance, the correct order from outside to inner side is phellem (cork), phellogen (cork cambium), secondary phloem (bast), and secondary xylem (wood). Ensuring the accuracy of this order aids in comprehending the stem's structure and functions. By grasping this sequence, one can delve deeper into the unique characteristics and roles of each layer within the stem.

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1. Identify the correct order of the following from outside to inner side in a woody dicot stem I. II. bast III. spring wood IV. phellem a. IV, I, II, III b. IV, I, III, II c. IV, III, II, I d. I, II, III, IV secondary cortex KARUNA SARASWAT SHARMA BIOLOGY LSC-100 VASCO CENTRE

BAST KARUNA SARASWAT SHARMA BIOLOGY LSC-100 VASCO CENTRE

2.Scattered vascular bundles are characteristic of a. Protostele b. Atactostele c. Polystele d. Eustele KARUNA SARASWAT SHARMA BIOLOGY LSC-100 VASCO CENTRE

2.Scattered vascular bundles are characteristic of The earliest vascular plants had stems with a central core of vascular tissue.This consisted of a cylindrical strand of xylem, surrounded by a region of phloem. Around the vascular tissue there might have been an endodermis that regulated the flow of water into and out of the vascular system. Such an arrangement is termed a protostele. KARUNA SARASWAT SHARMA BIOLOGY LSC-100 VASCO CENTRE

3. The following is responsible for total growth of a leaf a. Both primary and secondary meristem b. Only secondary meristem c. Only primary meristem d. Apical meristem KARUNA SARASWAT SHARMA BIOLOGY LSC-100 VASCO CENTRE

4. Functional xylem of a dicot tree is- Heart wood Autumn wood Spring wood Sapwood KARUNA SARASWAT SHARMA BIOLOGY LSC-100 VASCO CENTRE

5. This is an example of a winged fruit- a. Samara b. Cypsela c. Siliqua d. Regma KARUNA SARASWAT SHARMA BIOLOGY LSC-100 VASCO CENTRE

6. In marginal placentation, condition is a. Monocarpellary and syncarpous b. Bicarpellary c. Monocarpellay and bilocular d. Monocarpellary KARUNA SARASWAT SHARMA BIOLOGY LSC-100 VASCO CENTRE

7. Which of the following is a composite fruit that develops from hypanthodium inflorescence- a. Fig b. Pineapple c. Apple d. Banana KARUNA SARASWAT SHARMA BIOLOGY LSC-100 VASCO CENTRE

8.Which character cannot be shown in floral formula- a. Type of cohesion b. Adhesion c. Symmetry d. Superior / inferior ovary KARUNA SARASWAT SHARMA BIOLOGY LSC-100 VASCO CENTRE

9. Function of cork cambium is to produce- a. Cork and xylem b. Phellem and phellogen c. Cork and secondary cortex d. Secondary xylem and phloem KARUNA SARASWAT SHARMA BIOLOGY LSC-100 VASCO CENTRE

10.Parenchymatous tissue in monocot stem Ground tissue Bundle sheath Pericycle Endodermis KARUNA SARASWAT SHARMA BIOLOGY LSC-100 VASCO CENTRE

11.Inflorescence of Poaceae Spike of spikelets Scapigerous umbel Scorpioid cyme None of the above. KARUNA SARASWAT SHARMA BIOLOGY LSC-100 VASCO CENTRE

12.Which of the below are True? False A. The malpighian corpuscle, PCTand DCT of the nephron are situated in cortex of kidney B. In cortical nephron the Henle s loop runs deep into medulla C. The ascending limb of Henle s loop is impermeable to water D. When the glomerular blood pressure increases , then J.G. cells of the kidney release rennin. a. A,B,C are true, but D is false. b. A,C are true, but B, D are false c. A, D are true , but B, C are false d. A , C , D are true but B is false KARUNA SARASWAT SHARMA BIOLOGY LSC-100 VASCO CENTRE

13.Which of the following organisms is known to form abscesses in human liver, lungs, brain etc a. Entamoeba histolytica b. Moncystis c. Plasmodium d. Fasciola hepatica KARUNA SARASWAT SHARMA BIOLOGY LSC-100 VASCO CENTRE

14.Sea anemone belongs to a. Anthozoa b. Hydrozoa c. Scyphozoa d. Coelenterata KARUNA SARASWAT SHARMA BIOLOGY LSC-100 VASCO CENTRE

15.Male Ascaris differs from female in having a. Lips b. Amphids c. Pineal spicules d. Tail KARUNA SARASWAT SHARMA BIOLOGY LSC-100 VASCO CENTRE

16. Which one of the following is coelenterate a. Sea pen b. Sea horse c. Sea urchin d. Sea cucumber KARUNA SARASWAT SHARMA BIOLOGY LSC-100 VASCO CENTRE

17. Systematic, is the study of diversity of organisms and all their comparative and evolution relationship . Above statement is related to - a. Mendel b. Mayer c. G. Simpson d. Haeckel KARUNA SARASWAT SHARMA BIOLOGY LSC-100 VASCO CENTRE

18.Which one of the following theories was proposed by Weismann? a. Law of inheritance b. Theory of inheritance of acquired characters c. Theory of natural selection d. Theory of germ plasm KARUNA SARASWAT SHARMA BIOLOGY LSC-100 VASCO CENTRE

19. The chromosome carrying centromeres at one end a. Metacentric b. Submetacentric c. Acrocentric d. telocentric KARUNA SARASWAT SHARMA BIOLOGY LSC-100 VASCO CENTRE

20. spermatogenesis starts at puberty due to increase in secretion of a. LH b. FSH c. GnRH d. Testosterone KARUNA SARASWAT SHARMA BIOLOGY LSC-100 VASCO CENTRE

21. If a colour blind man marries a normal visioned woman then a. Both sons & daughters will be colour blind b. All the daughters are colour blind c. All sons are normal d. All sons are colour blind KARUNA SARASWAT SHARMA BIOLOGY LSC-100 VASCO CENTRE

22. Antrum is the cavity in the a. Testis b. Ovaries c. Primary follicle d. Graffian follicle KARUNA SARASWAT SHARMA BIOLOGY LSC-100 VASCO CENTRE

23. Which is NOT an example of genetic variation between two humans? a. SNPs b. VNTRs c. Inheritable mutations d. ESTs KARUNA SARASWAT SHARMA BIOLOGY LSC-100 VASCO CENTRE

24. Colour blindness occurs due to a. Dominant gene on X chromosome b. Recessive gene on X chromosome c. Recessive gene on autosome d. Dominant gene on autosomes KARUNA SARASWAT SHARMA BIOLOGY LSC-100 VASCO CENTRE