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Light Requirement - Seed Dormancy
The light requirement for germination of many seeds is presumably a mechanism that prevents the germination of small seeds buried deep underground, where they would exhaust their reserves before reaching the surface ad becoming autotrophic. However, after a fire many seeds germinate at once, and forest regeneration begins.
This mechanism prevents overcrowding in a mature forest and ensures rapid re-growth after a disaster. Not all seeds require light for germination; some are unaffected and a few are inhibited by light. Blue light at quite high intensity has some effect on the germ ination of certain seeds, but it is not clear whether this is mediated through the absorption of blue light by phytochrome or by some other pigment.
Explain in sequence the events that lead to the development of a 3-celled pollen grain from microspores mother cell in angiosperms.
give an account of specific characters of phylum porifera
function of epithelial tissue
Complement system is a chemical defense system which kills the microorganisms directly, it supplements inflammatory response, and works with, or complements, the immune system.
Give three examples of abiotic factors and explain how they interact. Abiotic factors contain temperature, humidity, pH, salinity, O 2 concentration, amount of sunlight, avail
General Principles for Incisions The general principles for placing incisions so as to create surgical flaps remain the same regardless of the reason for creating them. These a
Question 1 Explain pharmacokinetic parameters observed in plasma concentration time curve Question 2 What is Gas Chromatography? Mention the quantitative applications of gas
Q. Explain microbiology of Soil? Ans. You would realize that the soil contains greatest varieties of microorganisms. It actually serves as a medium for growth and developm
Q. What are the events that mark the end and the beginning of the first interphase period? What happens inside the cell in this period? The initial interphase period is the G1.
With your understanding of bone and muscle tissue (cells and the extracellular material) discuss two lifestyle factors (one for bone and one for muscle) that affect the growth, dev
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