Why does trachea have ‘C’shaped rings of cartilage?
C-shaped cartilage rings in the trachea prevent collapse by accommodating the adjacent esophagus.
Previous Year Papers
Explain sigmoid growth curve with the help of diagram.
1. Plant growth follows distinct phases: cell formation, enlargement, and maturation. 2. The initial phase involves meristematic cell division and the addition of new cells. 3. Newly formed cells elongate and undergo enlargement during the phase of cell enlargement. 4. Cell maturation follows, where cells differentiate into specialized types. 5. Growth rates vary across phases: … Read more
What is vernalization? Give its significance.
1. Vernalization is the artificial exposure of plants to low temperatures to boost seed production or induce flowering. 2. This process involves subjecting a fully hydrated seed to a cold treatment, curtailing the plant’s vegetative phase and promoting early flowering. 3. The vernalization sites vary among plants and can include the germinating seed, apical meristem … Read more
What is short day plant? Give any teo example.
1. Short day plants bloom with a prolonged period of darkness and a brief period of light, typically flowering in spring. 2. Long day plants, on the other hand, flower in response to a short period of darkness and an extended period of light, usually during summer. 3. Day-neutral plants flower independently of the duration … Read more
Enlist the role and deficiency symptoms of potassium.
Function: Regulating anion-cation balance within cells, essential for protein synthesis, contributing to cell membrane formation, modulating stomatal activity, activating enzymes, and sustaining cellular turgidity. Deficiency Indicators: Manifested as yellowing leaf edges and premature cell death.
Enlist the role and deficiency symptoms of phosphorus.
Function: Essential component of cell membranes, specific proteins, nucleic acids, and nucleotides; crucial for all phosphorylation reactions. Deficiency Effects: Manifests as poor growth and dull green leaves.
enlist the role and deficiency symptoms of nitrogen
Function: Serving as building blocks in proteins, nucleic acids, vitamins, hormones, coenzymes, ATP, and the chlorophyll molecule. Deficiency Effects: Manifesting as stunted growth and chlorosis.
Difference between Arithmetic and Geometric growth.
Arithmetic Growth: 1. Only one daughter cell continues division, while the other undergoes differentiation and maturation. 2. Rate of growth is constant, resulting in a linear curve described by Lt = Lo + rt. Geometric Growth: 1. Both daughter cells continue to divide and redivide. 2. Rate of growth is initially slow but becomes rapid, … Read more
Write a short note on Re differentiation.
1. Cell division gives rise to cells that eventually lose their ability to divide and undergo re-differentiation, specializing in specific functions. 2. An example of re-differentiation occurs during the formation of secondary xylem and phloem in the vascular cambium.
Write a short note on differentiation.
1. Differentiation is the mechanism through which cell types acquire unique forms and functions. 2. Stem cells utilize differentiation to transform into specialized cell types with specific roles. 3. This crucial process is fundamental for the development of diverse organs in multicellular organisms. 4. The differentiation of cells ensures the creation of distinct and functional … Read more