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Super Cooling - Temperature Relations in Animals
Super cooling is a phenomenon where body water is allowed to cool far below 0°C without formation of ice. Glycerol is effective in lowering both the freezing point and also the super cooling point. In addition, glycerol improves the tolerance to freezing in animals that tolerate ice formation. In some animals antifreeze compounds are found. For example in the Antarctic fish Trematomous borchgrevinki the blood contains a glycoprotein that acts as an antifreeze substance.
Long-term responses - Behaviour of Plants Plants alter their course of development to suit the prevailing environmental conditions. For example, leaf maturation and fall, onse
What are the main human blood group systems? In humans the major blood group systems are the ABO system, the Rh system and the MN system.
What role do catalysts play in chemical reactions? By decreasing the activation energy that is required for a reaction, a catalyst permits the reaction to proceed spontaneously
Q. Illustrate Chromosome Structure? Cytologists have studied chromosome morphology and have pointed out that the most interesting feature about the chromosome structure is the
What do you determine by Atriopore? The external opening to atrium. In cephalochordates water passes across pharyngeal slits into atrium and from there leaves through atriopore
Which type of reproductive structure has a better chance of survival if there was a sudden temperature change in its environment? A.)asci B.)zygosporangium C.)basidium D.)lichen
Define Determinants of Food Security - Food Availability? It depends on the quantum and quality of crops, livestock, fishery and other food sources, as well as commercial impor
oxygen affecting the growth of microorganism? The presence of oxygen in the atmosphere is required for the survival of human beings. Contrary to this, you would realize that th
The part of human brain which is a significant relay station for the sensory impulses and also is the origin of many of the involuntary acts of eye such as narrowing of the pupil i
Consider Neuron B in the frog central nervous system whose plasma membrane has a previously unknown channel that is selectively conductive to a newly discovered tetravalent anion n
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