Revision on Stems, Roots, and Photosynthesis
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STEMS
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Click on any word highlighted in red to view the image.
- The tree part that supports the leaves, flowers and fruits is known as ____ the stem
- Stems are divided into two groups namely: _______ ______ those that grow above the ground and those that grow underground.
- Those that grow above the ground include _______
- erect stem (e.g. palm tree, coconut and iroko),
- creeping stem (e.g. bahama grass and sweet potatoes), and
- climbing stem (e.g. yam and beans).
- Those that grow underground are _______
- suckers (e.g. plantains and pineapple),
- rhizomes (e.g. elephant grass, jinger),
- bulbs (e.g. onion) and
- tubers (e.g. irish potatoes, carrots).
- Stems hold the ______ in a better position to trap sunlight. branches
- Stems are also a pathway for _______ from the soil to the leaves and for _____ from the leaves to the roots. Water, food
- Stems also stores nutrients, and produces _______ new living tissue.
- What does climbing stems use when growing? tendrils for attachment
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ROOTS
- Four types of roots include: –tap roots (e.g. mango tree),
- – fibrous roots(e.g. maize, cocoyam),
- – prop roots (e.g. silk, cotton) and
- – adventitious roots (e.g. some grasses, fig trees).
- Some functions of the roots to the plants are: Roots hold the plant firm in the soil, absorb water from the soil, store food for the plant and are used as medicine.
- Plants also breathe through tiny holes on their roots and stems called _______________ lenticels
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PHOTOSYNTHESIS
- The process by which plants prepare their food in the presence of carbon dioxide, water, sunlight and chlorophyll is known as __ photosynthesis.
- Photosynthesis takes place only during the ___________ day.
- During the process of photosynthesis__________ is produced hence purifying the atmosphere. oxygen
- During the day plants take in_________ carbon dioxide and send out__________ oxygen, while during the night they take in____ oxygen and send out carbon dioxide.
- Photosynthesis takes place only in_____ green plants
- The green colouring matter or pigment on green plants is due to ____ chlorophyll
- Chlorophyll makes leaves _____ green.
- The two main parts of a chloroplast are ______ the grana and stroma.
- To perform photosynthesis, plants need four things: _______ carbon dioxide, water, sunlight and chlorophyll.
- The first stage of photosynthesis captures energy from the sun to _______ break down water molecules.
- The second stage of photosynthesis is ________ the Calvin cycle.
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