STD 12 - 5. molecular basis of inheritance — NEET STD 11 Science — Question

$(a)$ In roots, xylem and phloem in a vascular bundle are arranged in an alternate manner along the different radii.
$(b)$ Conjoint closed vascular bundles do not possess cambium
$(c)$ In open vascular bundles, cambium is present in between xylem and phloem
$(d)$ The vascular bundles of dicotyledonous stem possess endarch protoxylem
$(e)$ In monocotyledonous root, usually there are more than six xylem bundles present.

Choose the correct answer from the options given below:

$‘A’ $                                        $ ‘B’$

$(1) $ Auxin                        $(I)$ Ripening and maturity of fruits

$(2)$Gibberellin                 $(II)$Differentiation of xylem elements

$(3) $ Cytokinin                  $(III)$ Prevention of genetic and physiological dwarfism

$(4) $ Ethylene                   $(IV)$  Found from tumour tissue of tobacco

 $(1)$     $(2)$     $(3)$     $(4)$