...................................................................... (2) (Total 4 marks) Page 1 of 14 Q2. The drawing shows a potato plant producing new tubers (potatoes). Buds on the stem of the parent plant produce stolons. The new tubers are formed at the ends of the stolons (stems that grow downwards). (a) Explain why the new tubers are genetically identical to each other.
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or stem and planting it. This is called vegetative propagation. Horticulturists use cloning to grow plants with specific qualities‚ like height‚ flower colour and quality. They use a more complex method than vegetative propagation called tissue culture. Tissue culture starts by using a small piece of the desired plant such as a bud‚ node‚ leaf segment or root segment. It is grown in a test tube on a culture medium that provides nutrients. It is then chemically treated to produce shoots. Buds from
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Animations Title: Water Homeostasis Introduction 1. a. Water homeostasis is crucial to life. Define blood osmolarity. The osmotic pressure of blood/Measurement of the amount of solute concentrate. b. What is the nephron’s role regarding osmolarity? Filtration‚ reabsorption & secretions c. What two factors regulate body fluid osmolarity? - Formation of a medullary osmotic gradient - The amount of ADH (antidiuretic hormone) present at the
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hypertonic‚ and isotonic in terms of relative concentrations of osmotically active substances. 6. Discuss the influence of the cell wall on osmotic behavior in cells. 7. Explain how incubation plant tissues in a series of dilutions of sucrose can give an approximate measurement of osmolarity of tissue cells. 8. Explain why osmosis is important to cells. Introduction Maintaining the steady state of a cell is achieved only through regulated movement of materials through cytoplasm‚ across organelle
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Plant cells are eukaryotic cells that differ in several key aspects from the cells of other eukaryotic organisms. Their distinctive features include: A large central vacuole‚ a water-filled volume enclosed by a membrane known as the tonoplast maintains the cell’s turgor‚ controls movement of molecules between the cytosol and sap‚ stores useful material and digests waste proteins and organelles. A cell wall composed of cellulose and hemicellulose‚ pectin and in many cases lignin‚ is secreted by
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balanced internal environment. • In achieving homeostasis‚ animal maintain a relatively constant internal environment even when the external environment changes significantly. • In multicellular organisms‚ the internal environment refers to the tissue fluid that baths the cells. Homeostasis • Homeostatic mechanisms maintains optimal physical & chemical conditions in the body to allow normal enzymatic & other cellular activities to be carried out. • This enable the organisms to live in different
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protective spore case. When ready‚ it breaks open and spores are dispersed. Tuber formation in potatoes * Potatoes reproduce asexually by stem tubers. * They are swollen underground stems that grow from parent plant * Sucrose is transported in the phloem from the leaves into these underground stems that swell as they convert sucrose > starch. * Parent plant dies at end of growing season but tubers are left to survive over the winter. * Farmers dig em up and sell em.
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dishes. However‚ a few vegetables can be used in desserts and other sweet dishes‚ such as pumpkin pie and carrot cake. A fruit on the other hand is a part of a flowering plant that derives from specific tissues of the flower‚ one or more ovaries‚ and in some cases accessory tissues. Fruits are the means by which these plants disseminate seeds. Many of them that bear edible fruits‚ in particular‚ have propagated with the movements of humans and animals in a symbiotic relationship as a means
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zonal mandate‚ the institute has the responsibility of conducting research into: Genetic improvement of root & tuber crops of economic importance in Nigeria Agronomy of root and tuber crop production including farming systems development for the southeast agro ecology Design and fabrication of simple agricultural farm tools and equipment Storage‚ processing‚ utilization of root & tuber crop production. NRCRI has taken giant strides with
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ASSESSING FACTORS CONTRIBUTING TO LOW SWEET POTATO YIELD AMONG SMALLHOLDER FARMERS: IN MPINGU EXTENSION PLANNING AREA IN LILONGWE DISTRICT BY SAMUEL CHINTHALO Cell: 0888626384/0993260142 Email: Samuelchinthalo@yahoo.com A RESEARCH PROJECT PROPOSAL SUBMITTED TO THE FACULTY OF DEVELOPMENT STUDIES‚ AGRICULTURAL EXTENSION DEPARTMENT IN A PARTIAL FULFILMENT OF THE REQUIREMENTS OF BACHELOR OF SCIENCE DEGREE IN AGRICULTURAL EXTENSION UNIVERSITY OF MALAWI BUNDA COLLEGE OF
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