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Stems transport liquids
(a) Cut about 2 cm from the end of stems of celery and place them in cold water for about an hour to freshen. Next place the stems in dishes having red ink and let them stand for various hours. Observe the Stalks carefully. Cut them up into various Short lengths and observe where the ink has moved upward in the stem. Try to pull some of the tubes out of the celery stems.
(b) Cut about 2 cm from the end of the flower stalks of white carnations. The cutting Should be done with a sharp knife and under water. Place the stems with flowers in glasses having different shades of food colouring or coloured ink. Observe after various hours.
advantages and disadvantages of protozoa
Categories of Air Pollutants From the above list you can see that the air pollutants can be broadly classified into the following two categories: Primary Pollutants
A decrease in blood plasma levels of parathyroid hormone A. occurs in response to an increase in the levels of calcium ions in blood plasma. B. leads to an increase in the a
Explain the Economics in Nutrition? We mentioned earlier that nutritional problems affect the productivity of the individual, which, in turn affects the productivity of the nat
Exceptions to the Cell Theory Viruses, however, are not the only exception to the Cell Theory as formulated earlier. This has led scientists to take a much broader view of the
Which term is used to describe an animal which limits its activity to periods of dim light at dawn and dusk? a) Diurnal (pron: die-ER-nal) b) Vesperal (pron: VESS-per-al)
Are hormones only proteins? Some hormones are proteins, such as insulin, glucagon and ADH, others are derived from proteins (changed amino acids), like adrenaline and noradrena
Considering the hybridization in a trait like the color of the flowers of a given plant species (red/yellow) conditioned by a pair of different alleles in relation to complete domi
Q. How do calcium ions participate in muscle contraction? Why do both muscle relaxation and muscle contraction spend energy? In the muscle cells calcium ions are stored within
What are the three phases into which the cell respiration is divided? The three phases of aerobic cell respiration are glycolysis, Krebs cycle and respiratory chain (also calle
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