Virginal membrane

virginal membrane An obsolete term for hymen...

ATP is the energy source that is typically used by an organism in its daily activities. The name is based on its structu..

Hormones are chemical messengers produced by specialized glands and they were produced by switching on the genes designe..

If the balance of nature is left untouched, landscapes can change dramatically over time. A previous ecosystem is supers..

Geological periods is a study guide that cites the different geological periods on Earth's timeline. Each has a brief ov..

Photosynthesis is the process that plants undertake to create organic materials from carbon dioxide and water, with the ..

Animals living in aquatic habitats have diversified and evolved through time. They eventually occupy ecological niches a..

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