The rate at which an ecosystem accumulates energy or biomass, excluding the energy it uses for the process of respiration. This typically corresponds to the rate of photosynthesis, minus respiration by the photosynthesizers.
Hormones are produced in the endocrine glands of animals. The pituitary gland and hypothalamus are the most impor..
Plantlife can be studied at a variety of levels, from the molecular, genetic and biochemical level through organelles, c..
Learn how the way genes control and determine every aspect of the body. This lesson uses lac operon as an example. ..
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A balanced diet is essential to a healthy organism. Insufficiency or too much of a particular element or compound, such ..
Plants need to regulate water in order to stay upright and structurally stable. Find out the different evolutionary adap..
This tutorial describes the sigmoid curve, annual plant growth, tree growth, human growth, and insect growth as the grow..