|Using DNA in science and technology. | |A cycle is a biological pathway or process in which the end product of one cycle becomes the starting point for the next cycle. Write an essay| |about cycles in biology. | |Carbon dioxide may affect organisms directly or indirectly. Describe and explain these effects. | |The causes of disease in humans. | |Mean temperatures are rising in many parts of the world. The rising temperatures may | |result in physiological and ecological effects on living organisms. Describe and explain | |these effects. | |The causes of variation and its biological importance. | | | |The transfer of substances containing carbon between organisms and between organisms and the environment. | |Movement in cells. | |Transfer through ecosystems. | |The part played by the movement of substances across cell membranes in the functioning of...
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