Download A Closer Look at Plant Reproduction, Growth, and Ecology by Michael Anderson PDF

By Michael Anderson

The existence cycle of a plant might be really awesome to monitor, and the power of flowers will be actually mystifying; examine how definite environments are inhospitable to existence, but theyre sprinkled with numerous kinds of plants. Plant copy can happen asexually or sexually; the tactic of replica units the degree for the vegetation progress and adulthood. This flourishing quantity examines the techniques of plant copy and the phases of vegetation, whereas additionally spotlighting the position of crops in a variety of ecological settings.

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Extra info for A Closer Look at Plant Reproduction, Growth, and Ecology (Introduction to Biology)

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This decreases the concentration of water molecules. When this happens, even though the soil feels moist, water diffuses out of the plant cells and the plant wilts. Transpiration Once water enters a plant through the roots, it must be transported to other plant tissues. In the process known as transpiration, water is constantly evaporating from leaf cells—through the stomata (openings) of the leaves—and into the atmosphere. This is particularly true during the daytime when the 31 A closer look At PlAnt reProductIon, Growth, And ecoloGy stomata are open and the air is warm.

This is particularly true during the daytime when the 31 A closer look At PlAnt reProductIon, Growth, And ecoloGy stomata are open and the air is warm. It is estimated that a single oak tree gives off 90 to 100 gallons (340 to 380 liters) of water each day. Transpiration from the leaf cells lowers the concentration of water in these cells. This causes water to diffuse into the leaf cells from the cells of the xylem (a tissue that carries water and minerals) in the leaf veins. The loss of water from the xylem in the leaf veins lowers the concentration of water in the xylem tissues of the leaf.

Barley, wheat, and many other small grains blossom in early summer when the nights are relatively short, whereas corn, soybeans, and chrysanthemums bloom later, in midsummer and fall, when the nights are longer. Plants actually “measure” the duration of darkness rather than of light. The photoperiodism of plants is caused by changes in a pigment called phytochrome (from two Greek words: phyton, meaning “plant,” and chroma, meaning “color”). Phytochrome is a light-sensitive, blue-green pigment. It occurs in plant tissues in minute quantities—about one part in 10 million.

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