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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 […]

36. Mutation in a gene x in Arabidopsis thaliana results in more number of lateral root formation. Which one of the following is the correct statement? (1) The gene product […]

35. Which one of the following root initials gives rise to the root vascular system, including the pericycle? (1) Columella initials (2) Epidermal-lateral root cap initials (3) Cortical-endodermal initials (4) […]

34. The group of cells which generates the vascular tissues including the pericycle in roots of higher plants are called (1) procambium.                                            (2) protoderm. (3) ground meristem.                                                            (4) apical meristem. […]

The following statements have been proposed for plant vegetative development: (A) Lateral roots develop from epidermal cells. (B) Shoots axillary meristem develops from shoot apical meristem during differentiation of leaf […]

32. Due to the presence of cellulose in the cell wall of plants, leaf shape is determined in the leaf primorida by (1) rates of cell division. (2) planes of […]

31. Following are certain statements regarding seed development in plants: A. During final phase of development embryo’s of “orthodox” seeds became tolerant to desiccation, dehydrate losing up to 90% of […]

Following statements are made in relation to the five widely recognized stages of Arabidopsis embryogenesis: A. The fusion of haploid egg and sperm takes place in globular stage B. Rapid […]

In which of the following stages of Arabidopsis embryogenesis do the visible distinctions between the adaxial and abaxial tissues of the cotyledons become initially apparent? (1) Globular stage (2) Zygotic […]