Name the outer portion of a stem or root, bounded externally by the epidermis, and internally by the cells of the pericycle.

Name the outer portion of a stem or root, bounded externally by the epidermis, and internally by the cells of the pericycle. 
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1 Answer

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ANSWER: Cortex
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You are given a fairly old piece of dicot stem and a dicot root. Which of the following anatomical structures will you use to distinguish between the two? (a) Secondary xylem (b) Secondary phloem (c) Protoxylem (d) Cortical cells

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The following are true about antigen presenting cells (APC): a. Langerhan's cells are the antigen presenting cells of the epidermis b. CD8+ cells only recognize antigen presenting cells bearing MHC (major histocompatibility complex) class I c. tumour necrosis factor alpha (TNF ) can turn endothelial cells into antigen presenting cells d. all above

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In the leaves of C4 plants, malic acid formation during CO2 fixation occurs in the cells of (a) bundle sheath (b) phloem (c) epidermis (d) mesophyll.

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Of the following types of cells, which are believed to play a significant role in cutaneous immune system reactions? a) Langerhans’ cells Langerhans’ cells are common to the epidermis and are accessory cells of the afferent immune system process.

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A layer of dead skin cells is found in the: a) subcutaneous tissue b) dermis c) epidermis d) no dead cells are in the skin

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Read the different components from (i) to (iv) in the list given below and tell the correct order of the components with reference to their arrangement from outer side to inner side in a woody dicot stem. (i) Secondary cortex (ii) Wood (iii)Secondary phloem (iv) Phellem The correct order is (a) (iv), (i), (iii), (ii) (b) (iv), (iii), (i), (ii) (c) (iii), (iv), (ii), (i) (d) (i), (ii), (iv), (iii).

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Pericycle of roots produces (a) mechanical support (b) lateral roots (c) vascular bundles (d) adventitious buds.

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Some vascular bundles are described as open because these (a) are surrounded by pericycle but no endodermis (b) are capable of producing secondary xylem and phloem(c) possess conjunctive tissue between xylem and phloem (d) are not surrounded by pericycle.

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Last Answer : (b) are capable of producing secondary xylem and phloem