Answer:
They are composed of immature cells. ...
Absence of intercellular spaces.
Cells are oval, rounded or polygonal in shape.
Cells are always living and thin walled.
Cells are rich in cytoplasm with minute vacuoles. ...
Cell is diploid and shows mitotic cell division.
Explanation:
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Pylogenetic tree diagram is a diagram that represent evolutionary relationships among organisms. It reflect how species or other groups of organism evolved from a series of common ancestor.From this pylogenetic tree diagram the least related organism is insecta and Trilobites
Ans.
Nitrogen fertilizers are commonly used by farmers to increase crop production. Ammonium is the main component of nitrogen fertilizer, as it is easily assimilated by plants and provides nitrogen to them, while nitrate gets easily lost from the soil. During nitrogen cycle, ammonium is converted into nitrate by nitrification. So, nitrification inhibitors are used with to slow down the conversion of ammonium to nitrate to provide nitrogen for longer time.
Thus, 'to increase crop production, nitrification step of nitrogen cycle is preferred by farmers to block, or slow down.'
Explanation:
Students should realize that if an object weighs more than an equal volume of water, it is more dense and will sink, and if it weighs less than an equal volume of water, it is less dense and will float. Remember that the density of water is about 1 g/cm3.