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Dissecting simple flowers
Label each of five cards or pieces of White paper with one of the following words: stamens, pistil, petals,sepals, receptacle. Dissect a flower carefully and place the parts gently on the appropriate cards .
Some flowers can be pulled apart quite easily but a knife or scissors may be needed for others kind of flower. When we have a sufficient number of flowers available this exercise is most Important as an individual pupil activity. Simple flowers with a single row of petals should be selected.Pick up one of the stamens and rub the anther lightly across a piece of black paper. Traces of pollen will usually be seen by you.Cut the ovary crosswise with a sharp knife gently and count the ovules or "seed pockets". Look for traces of seeds in the ovules
Explain the Submucous Layer This layer consists of loose areolar connective tissue. There are lymph vessels, plexuses of blood vessels and nerves. The nerve plexus is meissner'
Define Hyposecretion of Adrenocortical Hormones Hyposecretion of hormones from the adrenal cortex results in the development of the condition known as Addison's disease. There
Explain in detail about the Viruses Viruses are the ultramicroscopic parasites which always require a living h ost for their multiplication. Since they are much smaller than ba
State the Chemical and Physical processes of weathering The chemical and physical processes of weathering aid each other. A rock mechanically broken into smaller pieces exposes
Packaging and storage of oil Rancidity can cause the oil to deteriorate and develop off-flavors during storage. Using clean, dry containers, which exclude light and heat, and p
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Chain Reaction: When the atomic nucleus splits, it not only gives off energy, but also throws out two or three more neutrons. 'These new neutrons can, in turn, split two or
Describe the factors which decide the broad area of scientific activity?
Floating bodies Fill the overflow can with water and let it run out unless the surface is level with the spout. Select a piece of wood that floats half or more submerged in the
A nearly horizontal,12 ft wide rectangular channel carries 60cfs at a depth of 3.0ft.The width of the channel is smoothly contracted to 6 ft at the downstream section. (a) Deter
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