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Leaf silhouettes
Place a leaf on a sheet of white paper and hold it securely with thumb or finger. Press a piece of natural or artificial sponge next to an ink pad. With short, firm strokes, rub outward around the whole edge of the leaf as shown in the diagram
Counter current flow - Respiration Each filament has an upper and a lower row of flat lamellae. The lamellae of successive filaments are in close contact. Gas exchange takes p
Both these neurotransmitter strengthen memory when they are released into the blood stream following learning. Stressful events stimulate release of stress hormones from the adrena
1)what is plasma membrane? 2)what is multicellularity
Production of Disease-free Plants Under normal conditions plants are infected by a wide range of pathogens such as bacteria, fungi, viruses, viroids, and insects like nematode
Mating and Fertilisation In all animals sperms are motile and have to move and seek the eggs to fertilise them. For this an aqueous environment is necessary. This need of a li
Trypanosomiasis The trypanosomiasis, also known as African sleeping sickness or Chaga’s disease, is caused by Trypanosoma cruzi, T. gambiense and T. rhodesience. T. evansi cau
Why does the recombination frequency of genes vary with the distance between them in the chromosome? The farther the distance among the loci of two genes in a chromosome the h
All plants and animals have a natural microflora associated with them. For example, the plants have a natural microflora associated with the surface of roots, stems, leaves e
Define Protection against poisoning - Function of Vitamin E? 1) Protection against poisoning: It protects liver from injury due to carbon tetra chloride poisoning. 2) Pr
Regarding the article "One Hundred Tests" which of the following is a false statement? A. Genetic tests like the one developed by Counsyl can examine the multilevel genetic net
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