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Q. What do you mean by Herbaria and Museums?
A herbarium is a collection of pressed and dried plants arranged according to some valid system of classification and available for reference. All research and educational institutions related to plant species have their own specimens collected locally and also millions of gradually accumulated specimens which document the flora of one or more continents. Harbaria began early in the sixteenth century in Italy as collection of dried plants sewn on paper. Linnaeus popularised the current practice of mounting specimens on single sheets of paper and storing them in stacks. Herbaria are the permanent repositories of plant specimens and are sources of information about plant and vegetation.
Xylem transfer cells The lateral transport of ions from root xylem to leaves probably takes place via xylem transfer cells which have two special features: The ce
Give definitions of atomic number and atomic mass and how they relate to protons, neutrons, and electrons in neutral atoms?
Which of the below determines the major difference between bryophytes (pron: bry-oh-fites) and tracheophytes (pron: tray-key-o-fites)? a) Tracheophytes can make their own food
Classification of lipids A general classification of lipids based on their structural components is presented in table. Such a classification, however, is possibly too rigid f
Cardiac Output - Circulation The cardiac output can be determined in a number of ways. The most common method is the Fick's principle. A. Fick a German physiologist in 1870 de
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Photometer Photometer (Figure shown below) measures the intensity of light. The metallic plate A is a photocell which emits electrons from its surface when light of sufficient
What process causes oxygen to pass from the alveoli into the lung capillaries? Diffusion is the process by which oxygen passes from the alveoli to the lung capillaries.
Explain how early RNA molecules might have been able to respond to natural selection. Every RNA molecule might have competed with slightly dissimilar RNA molecules for nucleoti
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