SC160.3.1 Basic BiologyAssignment 3_03June 16th2016All living things are composed of cells, they share several characteristics. Organisms are coordinated structure that consists of one or more cells. Even a simple single cell organisms are complex as inside each cell atoms made up molecules; these in tern makes up cell organelles. Organisms can respond to diverse stimuli. For example plants tends to grow in the direction of the light. Even bacteria can move forward or away from chemical. A single cell organisms reproduce by first duplicating their DNA. Then they divide it equally as the cell prepares to formnew cells.There are two major categories of cells, these includes eukaryotic cells and prokaryotic cells. Eukaryotic cells can be further distinguished as animal cells or plant cells. Prokaryotic cells are atype of cell lacking a nucleus and other organelles, these cells are found only in the domains Bacteria and Archaea. Eukaryotic cells have a membrane enclosed nucleus and other membrane enclosed organelles. The nucleus in the eukaryotic cell holds the majority of the genetic material and controls all activity within the cell, similar to that of a master blueprint. DNA replication which can be defined as the process where two identical copies are created fromone original DNA strand occurs within the nucleus of the cell. The movement of the MRNA happens in the ribosomes.Ribosomes are cells that helps in the production of protein, they are responsible to link amino acids together. When cells need to produce protein (mRNA) is created in the nucleus. There are
DNA in Forensic Science
DNA forensics is a division of forensic science that centers its attention on the use of genetic material in criminal examination to answer questions in conjunction with legal situations, together with criminal and civil cases. DNA fingerprinting as it is most commonly known is defined as “The technique used to identify individuals by characteristics of their DNA (Wikipedia)”. One example of how DNA forensics can be applied in biology is by comparing that of a suspect's blood or other body material to that of the evidence from the crime scene to see how closely they match. Another example is using it to exonerate or free persons wrongfully convicted of crimes. “All states have established DNA fingerprint databases and require the collection of DNA from convicted felons (Infoplease, Encyclopedia)”. The third example of how DNA can be used in biology is to show the evolution of and relation between different organisms. This is done by using small samples of bone, skin and other types of tissue from previous species.
Population Evolution and Microbial Life
Population evolution refers to the changes a population undergoes when organisms; whether they be single microorganisms or multi cellular humans, transform over a period of time. Over time species that are fit for a specific environment survive while the weaker ones die. Eventually what comes out of it after time is a species that is better adapted to the environment. This growth is usually caused by natural selection, the process first fully explored by Charles Darwin. Microorganisms are organisms that are too small to see by the naked eye however they are continuously adapting and very resilient. All living thing on earth are occupied by and mutually dependent on microbial life. One example of microevolution is the size change in the house sparrow introduced to North America. Since 1952 the sparrows in the north have evolved to have larger bodies than...