First published on November 24‚ 1859‚ The Origin of Species (full title On the Origin of Species by Means of Natural Selection‚ or the Preservation of Favoured Races in the Struggle for Life) by English naturalist Charles Darwin is one of the pivotal works in scientific history‚ and arguably the pre-eminent work in biology. In it‚ Darwin makes "one long argument‚"with copious empircal examples as support‚ for his theory that "groups" of organisms‚ (now called populations) rather than individual organisms
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Invasive Species: Asian Carp Asian carps are different species of fish that originated in many parts of Eurasia. There are 4 different types of Asian carps‚ but the silver carp and bighead carp are mostly found in the Mississippi River drainage basin and Illinois River. The silver and bighead carp first came to North America from China in 1973. Being filter feeders‚ they were imported to remove algae and suspended matter‚ ultimately trying to improve water qualities in aquaculture ponds. However
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The Asiatic lion (Panthera leo persica)‚ also known as the Indian lion‚ is a lion subspecies that exists as a single isolated population in India’s Gujarat State. It is listed as Endangered by IUCN based on the small population size.[1] The lion population has steadily increased in Gir Forest National Park‚ more than doubling from a low of 180 individuals in 1974 to a level of 411 individuals consisting of 97 adult males‚ 162 adult females‚ 75 sub-adults‚ and 77 cubs as of April 2010.[3] The Asiatic
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their name from their painful stings and bites. They are a special type of ant that is actually a health threat and an environmental threat as well. They are small yellowish-red to black ants‚ all in the Genus: Solenopsis. The two most important species are the Red Imported Fire Ant (RIFA)‚ Solenopsis Invicta‚ and the Solenopsis xyloni. It is found in the family Formicidae. This small insect can mean big problems for people and animals. The habitat of the fire ant has contributed to its rapid
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1. Decodable Text * There are five levels of decodable text‚ ranging from highly decodable to minimally decodable. Highly decodable books use one-syllable and one-vowel-sound words‚ such as “cat‚” “fun” or “sit.” These might also use some short sight words‚ such as “a‚” “an” and “the.” Very decodable text still uses simple words‚ but those words may now have an extra letter or use blends that the students are learning in class‚ such as “this‚” “such” or “that.” Decodable text adds more of
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What is it?Lactobacillus is a type of bacteria. There are lots of different species of lactobacillus. These are "friendly" bacteria that normally live in our digestive‚ urinary‚ and genital systems without causing disease. Lactobacillus is also in some fermented foods like yogurt and in dietary supplements.Lactobacillus is used for treating and preventing diarrhea‚ including infectious types such as rotaviral diarrhea in children and traveler’s diarrhea. It is also used to prevent and treat diarrhea
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In the morning‚ Rainsford awakes in Zaroff’s comfortable bed. But to his surprise he finds Zaroff sitting on the chair next to the bed pointing a gun straight to his face. With sudden shock Rainsford gets up quickly. Fear filled his whole body‚ sweat poured down his face‚ and his body froze. “Walk slowly‚ don’t make no sudden movement’s son.” Zaroff said calmly‚ but firm. Walking slowly but steady he crosses the room to the door. He opens the door and walks out with the gun still to his forehead
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on the notion of variation. It argues that the numerous traits and adaptations that differentiate species from each other also explain how species evolved over time and gradually diverged. Variations in organisms are apparent both within domesticated species and within species throughout the natural world. Variations in colors‚ structures‚ organs‚ and physical traits differentiate a multitude of species from one another. Heredity is the mechanism that perpetuates variations‚ Darwin argues‚ as traits
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may not be as glamorous as the megafauna of the Serengeti or the bird life of Borneo‚ but these “rocky intertidal” areas turn out to be great places to study community ecology. An ecological community is a group of species that live together and interact with each other. Some species eat others‚ some provide shelter for their neighbors‚ and some compete with each other for food and/or space. These relationships bind a community together and determine the local community structure: the composition
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Evolution: descent with modification; the idea that living species are descendants of ancestral species that were different from the present-day ones. Biology: the scientific study of life. Emergent properties: new properties that emerge with each step upward in the hierarchy of life‚ owing to the arrangement and interaction of parts as complexity increases. Systems biology: an approach to studying biology that aims to model the dynamic behavior of whole biological systems based on a study of the
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