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 […]
Tag: Morphogenesis and Organogenesis in Plants
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CSIR NET Life Science Previous Year Questions and Solution on Basic Concepts of Development
Genetic Regulation of Juvenile to Adult and Reproductive Phase Transition in Arabidopsis: Roles of miR156, SPL Genes, miR172, and AP2-like Genes
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 […]
CSIR NET Life Science Previous Year Questions and Solution on Basic Concepts of Development
T-DNA Insertional Mutagenesis in Arabidopsis: Understanding Zygotic Lethality Through Segregation Distortion
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 […]
CSIR NET Life Science Previous Year Questions and Solution on Basic Concepts of Development
Gene Regulation of Lateral Root Formation in Arabidopsis: Negative Regulators and Mutant Phenotypes
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 […]
CSIR NET Life Science Previous Year Questions and Solution on Basic Concepts of Development
Stele Initials: Originators of the Root Vascular System and Pericycle in Higher Plants
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) […]
CSIR NET Life Science Previous Year Questions and Solution on Basic Concepts of Development
Procambium: Origin and Role in Vascular Tissue Development in Roots of Higher Plants
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. […]
CSIR NET Life Science Previous Year Questions and Solution on Basic Concepts of Development
Vegetative Development in Plants: Root Cap Cells and Secondary Growth by Lateral Meristems
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 […]
CSIR NET Life Science Previous Year Questions and Solution on Basic Concepts of Development
Role of Cell Division Planes in Determining Leaf Shape in Plants
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 […]
CSIR NET Life Science Previous Year Questions and Solution on Basic Concepts of Development
Seed Development in Plants: Desiccation Tolerance, Dormancy, and Precocious Germination
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 […]
CSIR NET Life Science Previous Year Questions and Solution on Basic Concepts of Development
Key Stages of Arabidopsis Embryogenesis: Heart and Torpedo Morphogenesis Explained
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 […]
