A student plants pea seeds in three identical pots. Each pot contains three seeds. The first pot contains potting soil, the second pot contains clay and the third pot contains sand. The seeds are given the same amount of water and sunlight for three weeks. What is the independent variable in this experiment?

c-reactive protein (crp) is an acute phase protein belonging to pentraxin family of proteins, whose levels increases 1000-fold or more in concentration in blood during the occurrence of an injury, inflammation or tissue death.

a. seed plant structure. 1. the three main plant organs are roots, stems, and leaves. a fourth kind of tissue, meristematic tissue, is responsible for plant growth. meristematic tissue is the only plant tissue that produces new cells by mitosis. plants can lose water out of their leaves as they exchange gases with the air

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