By O.F.G. KILGOUR
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Others, like the field mushroom and moulds, are saprophytes, helping to decompose organic material. 17 Penicillium, a green mould 0 l 0 0 0 00 0 lmm j Septum Cell wall of chitin .. THE BODY FORM AND STRUCTURE OF LIVING THINGS 51 Kingdom Plants The plant kingdom consists of over 400 000 species. They all share the following characteristics: • the body is composed of many cells - it is multicellular; • cell walls are made of cellulose; • chlorophyll is present in all plants; • genetic material is contained within a nuclear envelope.
4 from 55 em + 60 em ... to 120 em + 125 em. Using a calculator this totals 1350 em. e. 15. 0 em. Ratios A ratio is the numerical relation that one quantity bears to another. 4 grouped all plants of 85 em and under as dwarf plants and the remainder (over 85 em in height) were called tall. By this calculation 67 are dwarf (85 em or under in height) and 293- 67 = 226 are tall (over 85 em in height). 4:1 Percentages Percentage value is a part of one hundred expressed in hundredths. 13% are tall plants.
A mitochondrion is a sausage-shaped organelle in which chemical reactions take place to release energy from food. In a very active cell such as a liver cell there may be up to 1000 mitochondria in the cytoplasm. ___ Nucleus Nuclear envelope Cell surface - - - - \ membrane Animal cells are generally smaller than plant cells. They have an irregular shape. Vacuoles may not be present but when they do occur they are small, numerous and temporary. Granules of the the carbohydrate glycogen are found in the cytoplasm.