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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.
how does epigenetic controls transcription?
ACCESSORY GLANDS - 1 . PROSTATE GLAND - One in number, 4-5 lobed, it forms 15-30% of semen.Citric acid, lipid, acid phosphatase spermin, fibrinolysine are present.
At 1 AM, a researcher places a healthy squid giant axon in a bath of normal squid physiological extracellular saline and internally perfuses the axon with normal squid intracellula
Q. Clinical Features of aortic stenosis? Patients with congenital aortic stenosis usually present in childhood or adolescence. Those with rheumatic heart disease present durin
Define Traditional Cycle of Root Canal Treatment The traditional cycle of Root Canal Treatment a) Dig in the tooth to make a big hole b) Then, look through this hole to f
MAY BEAR CLICA
write the names of these animals? 1.amoeba 2.sponge 3.hydra 4.liverfluck 5.Iscariot 6.leech 7.insects 8.oyster 9.starfish 10.frog
Q. Explain Clinical Manifestations of cardiomyopathy? 1) Asymptomatic, when the diagnosis is made by 2D Echocardiography. 2) Enlargement of LV. Apex is shifted down and out.
Effects on plants of Air pollutants SO 2 , O 3 and NO 2 are strong oxidants and can bring about significant changes in plant cell chemistry. The general effects of pollutant
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