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Hace 4 días · Endangered species, any species that is at risk of extinction because of a sudden rapid decrease in its population or a loss of its critical habitat. Previously, any species of plant or animal that was threatened with extinction could be called an endangered species.
Hace 4 días · Rare animals are fascinating creatures that you might only see once in several decades due to their scarcity. This reference aims to teach vocabulary to English learners by exploring these unique animals and offering detailed sections on the world’s rarest animals and interesting facts about them.
Hace 4 días · Search the Merriam-Webster Thesaurus for millions of synonyms, similar words, and antonyms. Our unique ranking system helps you find the right word fast and expand your English vocabulary.
Hace 4 días · Definition and Classification. Rare diseases are typically defined as conditions that affect fewer than 200,000 individuals in the United States. They are often serious, chronic, and life-threatening. The term "orphan diseases" is also used because these conditions are often overlooked in medical research and treatment.
Hace 3 días · The name multiple sclerosis refers to the scars (sclerae – better known as plaques or lesions) that form in the nervous system. These lesions most commonly affect the white matter in the optic nerve, brain stem, basal ganglia, and spinal cord, or white matter tracts close to the lateral ventricles. [1]
Hace 5 días · parthenogenesis, a reproductive strategy that involves development of a female (rarely a male) gamete (sex cell) without fertilization. It occurs commonly among lower plants and invertebrate animals (particularly rotifers, aphids, ants, wasps, and bees) and rarely among higher vertebrates.
Hace 5 días · recycling, recovery and reprocessing of waste materials for use in new products. The basic phases in recycling are the collection of waste materials, their processing or manufacture into new products, and the purchase of those products, which may then themselves be recycled.
