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Ws_Ch14_e

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Cells divide by (2) _______________ cell division. This leads to an increase in the (3) _______________ of cells. EMBED Word.Picture.8 Cells assimilate food substances and synthesize new materials. This leads to an increase in the (4) _______________ of cells. Development (Book 2, p. 14-3) Similar types of specialized cells group together to form tissues, organs and (9) _______________. This increases the complexity of the body organization. EMBED Word.Picture.8 ( Development increases the complexity of cells and complexity of body organization 14.2 Growth and development in plants (Book 2, p. 14-5) ASeed germination (Book 2, p. 14-5) Root hairs develop on the radicle to increase the (6) _______________ _______________ for water and mineral absorption. EMBED Word.Picture.8 Day 4 Young leaves develop to make food by (10) _______________. The cotyledons will fall off. Conditions necessary for seed germination ConditionReasonWaterWater softens the seed coat and makes cotyledons (11) ______________ to break the seed coat, so that the (12) _______________ can emerge. Water (13) _______________ enzymes in the seed, which help convert insoluble food reserves into simpler and soluble forms. Water acts as a (14) _______________ for the transport of soluble food.WarmthWarm environment allows the (15) _______________ in the seed to work efficiently.OxygenOxygen is needed in (16) _______________, which provides energy for the growth of the embryo. ( Go to Practical 14.1Design an investigation of the conditions for seed germination (Book 2, p. 14-6 Practical Workbook for SBA 2, p. 14-1) BWhere do growth and development take place in plants (Book 2, p. 14-7) Growth of the plants only occurs at the tips of the roots and shoots and the (17) _______________ of roots and stems. These regions contain (18) _______________. They are groups of (19) _______________ cells which are able to divide by mitotic cell...