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Ferns and their relatives are vascular plants, meaning they have xylem and phloem tissues. Because of the presence of va..
Photosynthesis is the process that plants undertake to create organic materials from carbon dioxide and water, with the ..
Obtaining air outside an aquatic environment required species to acquire suitable adaptations, and this was the case of ..
With regard to the population size of a species and what factors may affect them, two factors have been defined. They ar..