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Man is totally dependent on plants, directly or indirectly, for food; plants and plant products are also essential in medicine and industry
The Importance of Plants
Trees, shrubs, vines, and herbs (woody and herbaceous)
How land plants may be grouped according to the size and type of the stem
Annuals: One growing season; Biennials: Two growing seasons; Perennials: Live year to year and bloom each season
The difference between annuals, biennials, and perennials
Cell membrane and cell wall
The parts of a plant cell that separate its contents from surrounding environment
group of structures designed to function together as a unit to perform a particular job for an organism
A structure within a system which has a definite form and performs a definite function or functions for the system
Living material which is constructed in such a way as to perform a particular task for the organs of an organism.
Underground, anchoring the plant, functions in the absorption of nutrients and storage of food
Above ground, holds up leaves towards the sun for manufacturing food, and providing for the production of flowers, fruits, and seeds.
The passage of water through a plant from the roots through the vascular system to the atmosphere
The green pigment which gives plants their color and enables them to capture the energy of the sun
The process whereby a plant's chloroplasts capture the radiant energy of sunlight and convert it into the chemical energy of food is called photosynthesis
Plant cells obtain energy by oxidizing sugars, or combining them with oxygen in a chemical reaction roughly comparable to burning.
Style and Stigma
The stalklike structure that connects the ovary to the tip of the pistil; Part of the flower which receives the pollen grains at the time of pollination
When the ovules begin developing into seeds only after a sperm cell brought by pollen grain fuses with the egg cell within the ovule.
Help plants reproduce after their kind by forming reproductive cells; produce fruits and seeds
The Purpose of Flowers
Ordinary leaves have petioles, whereas sessile leaves do not
How are sessile leaves different from ordinary leaves?
Simple leaves have only one blade per petiole; compound leaves have more than one blade per patiole
How are simple leaves different from compound leaves?
Xylem tissue transports water and minerals upward to the leaves; phloem tissue transport food manufactured down to the rest of the plant
Explain the function of xylem and phloem tissue
To provide covering and protection for both the upper and lower leaf surfaces
Explain the purpose of a leaf's epidermis
The veins contain the vascular tissue and transport food, sap and minerals throughout the leaf.
What is the purpose of leaf veins?
When the abscission layer forms, the chlorophyll in the leaf begins to deteriorate, allowing other pigments that had previously been hidden by the chlorophyll become visible
What causes leaves to turn different colors in autumn?
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