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PINEAL GLAND (EPIPHYSIS CEREBRI) -
Hormone - Melatonin concentration in the blood appears to flow a diurnal (day-night) cycle as it arises, in the evening and through the night and drops to a low around noon. Because of this light mediated response, the pineal gland may act as a kind of "biological clock" which may produce circadian rhythms (variations following a 24 hour cycle).
Girls blind from birth attain puberty earlier than normal, apparently because there is no inhibitory effect of melatonin on ovarian function.
Medicinal Value - Conservation of Wildlife About 40% of all drugs used throughout the world have active ingredients extracted from plants and animals. The world-wide annual sa
Heliozoans - Protozoan Heliozoans are spherical protozoan that occur in the sea or in still bodies of fresh water. They are mainly located in the bottom debris. Fine needle li
what is welfare in biology
CALCIUM It is the most abundant mineral of animal body. Calcium is available in all types of vegetables, grain, milk, cheese, eggs, fish and butter. By its deficiency r
How many biochemicals would be detected in the stomach contents of an omnivorous dinosaur?
Toxoplasma cycles between its rodent and feline hosts, living out different phases of its existence in each. What is the scientific means about the cat and mouse?
How does light intensity affect oxygen production?
Proteins are very essential macromolecules as they have a range of many important functions like: • Required for building and repair of body tissues (including muscle) • Enzy
A glycosidic bond would be present in: Select one: a. acetone. b. methyl-alpha-D-glucose. c. 2-deoxy-beta-D-ribose. d. glucose-6-phosphate. e. fructose-1, 6-bisphosp
Define etiological risk factors in cancer - Genetic Factors? Some cancers are programmed by genes to develop. Gene mutations result from one or more regulatory genes in the cel
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