History of biology

Recruitment of Organisms in the Galveston Ship Channel Abstract A study was done in the Galveston Ship Channel to see the recruitment of sessile or fouling organisms to a substrate. A total of six organisms were found. They were Barnacles, Serpulid Worms, Bryozoan, Limpets, Tunicates, and Amphipods. Recruitment structures were created by the students and were put into the Galveston Ship Channel and left for five weeks to allow adequate time for organisms to adhere to it. A full mesh cage was…

What were the causes of the different results of MAundsen and Scott expeditions to the south pole in 1911 In the peak of Heroic age of Antarctic discovery, a race to reach the center of the south pole was started by two exploreres. The first one Robert Falcon Scott, with the help of the Geographical Society of England, started planning his journey, without the pressure of the race until when in meltrne he received the telegram of Amundsen communicating his expendieron to the south pole.…

Charles Darwin was a naturalist from the 19th century. He studied finches during his voyage to the Galapagos Islands. Another organism he studied on his voyage was tortoises. Two different organisms that Darwin studied after his voyage to the Galapagos Islands are pigeons and earthworms. The pigeon was the most important bird that Charles Darwin studied. One thing he learned about the different species of pigeons, is there were various breeds. The different types of pigeons interested many…

Investigating the Effects of Environmental Differences in Nest Ectoparasite Abundance on Mountain Bluebird (Sialia currucoides) Reproductive Success Materials and Methods Mountain bluebirds, (Sialia currucoides) are sexually dimorphic insectivorous songbirds, which defend a breeding territory approximately five ha in size, while giving biparental care to their altricial offspring (Power and Lombardo 1996). Bluebirds are often parasitized by hematophagous nest ectoparasitic blowfly larvae, which…

Are people the way they are because of their genes (nature), or because of how they were brought up (nurture)? Multiple sources provide insight that points towards humans being nurtured as opposed to being nature. One source is Mary Shelley’s Frankenstein which is about Dr. Victor Frankenstein and how he creates a creature who is nurtured by society through multiple events. He obtains multiple traits throughout the story. The next source is “The Nature vs. Nurture Debate” which discusses both…

Name: Desire Salazar Date: 12/15/17 Period: Pre-AP Biology 5th Title: Population Genetics and Evolution Problem: How does the Hardy-Weinberg law provide evidence of evolution? Background Information: The lab will determine how the Hardy-Weinberg law provides evidence of evolution in a population. A population is “a group of organisms of one species that interbreed and live in the same place at the same time” (Biology Online). In each population, are three key elements: size, density, and…

Genetic drift is a mechanism of evolution that occurs by random chance rather than natural selection. In genetic drift, a population experiences a change in the frequency of a given allele, prompted by random luck rather than a need for adaptation. This differs from natural selection, in which allelic frequency is altered based on the fittest genes surviving to reproduce and the weaker genes dying off. Genetic drift tends to be a phenomenon amongst smaller populations, while natural selection…

Scientists classify organisms by grouping and sorting organisms together based on their physical structure, evolutionary relationships, embryonic similarities, genetic similarities, and their biochemical similarities. The most popular form of classification system used by scientists is Linnaeus’s System of Classification, by which organisms are classified and grouped into 6 different kingdoms; bacteria, archaea, protista, fungi, plant and animal. By classifying organisms it provides scientists…

Mutations are changes in the genetic code which is the only way through which new genetic material and variations can be obtained. Mutations further include chromosomal mutations which is necessary for various variations. Genetic Drift can be defined as how the changes that occur randomly in the frequency of alleles which impact populations of many species. These also lead to effects such as bottle neck and founders effect. Natural Selection revolves around the concept of fitness which…

Friday in the journal Science uses life history theory to explain why tropical songbirds typically raise fewer chicks than temperate songbirds. What’s life history theory? Life history theory seeks to explain the ways in which natural selection works to determine a given organism’s anatomy and behaviors. Life history theory suggests that reproductive tendencies, or “life history strategies,” are part of a complex system of species traits, or “life history characteristics.” Parent organisms…