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Effect of Temperature
Certain plants such as the winter rye (Secale cereale) and the biennial strain of henbane (Hyoscyamus Niger) require exposure to low temperature conditions before they start flowering. A phenomenon known as 'vernalization' or 'Yaronization' was noted by the Russian Plant physiologist Gustav Gussner in 1915. Here also embryo or shoot apex seems to be the site of perception and the role of a hormone 'Vernalin" is suggested. Unfortunately like florigen, vernalin has been still elusive. Gibberellin treatment is known to substitute for cold treatment.
(a) What are the two main pollutants that contribute to acid rain? (b) Where do these pollutants come from? (c) What direct or indirect effect is 'acid rain
Explain the Skeletal System? Skeletal System: The support framework, or skeleton, in the human body is composed of mostly hard mineral substances. Unlike crustaceans or insec
Describe the mechanisms and genetic regulations that underpin how two cells such as cardiomyocyte and a motor neuron have identical gnomes, yet are functionally and structurally di
gaseous exchange in man
Q What is the morphological feature of molluscs after which the phylum is named? The word "mollusc" imply "soft thing". Molluscs have soft bodies and this feature describes the
What are the main components of the human skeleton?
Where in eukaryotic cells does mRNA synthesis occur? To where do these molecules migrate? Messenger RNA molecules are synthesized within the nucleus, pass by pores of the nucle
What is Bile salts Bile salts have a considerable ability to lower surface tension. By this property, they prevent the coming together of the small fat droplets in the in
explain the different types of symmetry in metazoans.
Define Planning for nutritional need For Adults? The term 'adult' refers to any individual in the age group of twenty years and above. The period beginning from twenty years an
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