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46. Following are certain statements regarding root growth and differentiation in plants: A. Root hair, endodermis, xylem and phloem reach maturation in elongation zone of a developing root. B. The […]

Given below are statements related to different aspects of plant growth and development. A. Leaf longevity is increased in ethylene insensitive mutants eir1-1 and ein2 of Arabidopsis. B. Programmed cell […]

Change in leaf morphology is observed during transition from vegetative to reproductive phase in several plants. The following statements are proposed to explain the above observation: A. Alteration in the […]

43. Given below are factors/terms associated with various aspects of plant growth and development: Which one of the following options represents the most appropriate match between all terms of Column […]

42. Genetic screens for mutants affecting development of leaf trichomes have led to the discovery of genes regulating trichome patterning – especially trichome density and spacing, as depicted in the […]

41. The following diagram represents a longitudinal section through an Arabidopsis shoot apical meristem (SAM) and leaf primordium at its flank. The dorsal (D) and ventral (V) domains are marked. […]

Members of the WUSCHEL RELATED HOMEOBOX (WOX) transcription factor family play an important role during zygote elongation and division in Arabidopsis. Following are certain statements regarding the expression of different […]

39. Consider the following facts regarding the control of shoot apical meristem (SAM) size in Arabidopsis (a) Loss of the CLAVATA1 (CLV1) gene leads to bigger SAM (b) Loss of […]

38. Extensive molecular genetic studies on miR156, miR172, SPL genes and AP2- like genes have yielded the following functional model on the juvenile → adult → reproductive transition in Arabidopsis […]

Identification of genes that are associated with the development of male and/or female gametophyte and embryogenesis in plants is facilitated by T-DNA mediated insertional mutagenesis. In an experiment, a transgenic […]