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What are mycorrhizas? How does each participant benefit in this ecological interaction?
Mycorrhizas are mutualist ecological interactions among fungi and some plants roots. Fungi provide to the plant more water and mineral salts and get organic material from the vegetable.
Nitrogen Fixation As we have said before, atmospheric nitrogen cannot be used by plants or animals. It has to be first fixed. The term nitrogen fixation refers to the oxidatio
Ecological adaptation in animals to aquatic environment In the aquatic environment animals are confronted with the problem of excess water. Freshwater and marine animals try to
How to increase in sodium conductance A complete motor neuron is removed from a frog and placed in normal physiological saline at 1 AM. The neuron is healthy. At 2 AM, the ph
THEOR Y OF EPIGENESIS - It was propounded by C. F. Wolff and supported by Von Baer. According to it, the egg contains the substances which are required in the formation
complete assignment
How does the structure of a chloroplast enable it to build up a concentration gradient of protons? Chloroplasts have an inner membrane system having of thylakoids. The pumpin
Nuclear Type - Endosperm The primary endosperm nucleus divides. The cell wall is not laid. These nuclei and their division products form a large number of free nuclei. The fi
briefly explaintransport system in earthworm
Prevention of Accidents - Accidents and Losses The theories of accident causation explained earlier serve as good guide to prevent accident. The factors that may cause acciden
Q. What is the function of mineral salts in the creation of electric tension (voltage) at the cellular level? The electric activity of the cell, for example, in neurons, depend
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