Biology: The Evolution of populations

Microevolution: The change in the genetic makeup of a population from generation to generation Mendel’s model: the particulate hypothesis of inheritance Quantitative characteristics: characteristics of a population that vary along continuum. Eg. Fur length in mammals Population genetics: study of how populations change genetically over time. Modern synthesis: a comprehensive theory of evolution that integrated…

Double Displacement Reactions: Forming Precipitate Lab Answers

Introduction In this lab, double replacement reactions between compounds were done in order to determine the equation and description of a new substance. During the lab, each participant was given drop bottles, spot plates. The drop bottles contained different compounds which were dropped into the spot plates and mixed together. Compounds were combined together and…

Biological Forms of Energy and Reducing Power

Living organisms carry out a diverse set of tasks, such as building and maintaining physical structures, moving, synthesizing macromolecules, maintaining electrochemical gradients, and maintaining a constant body temperature. All of these processes require energy. One fundamental problem living organisms face is how to obtain energy to carry out these tasks. When considered at their most…

Lipids and Biological Membranes

All cells are enclosed by a membrane composed of lipids, proteins and carbohydrates. Eucaryotic cells also have internal membranes that divide the cell into different compartments. Biological membranes have several important functions, including: They separate the contents of a cell or organelle from the surrounding environment. They control import and export of molecules (e.g., nutrients,…

Cellular Organelles & Structures

Organelle Structure Function Nucleus -classified as eukaryotic or prokaryotic depending on whether or not it has a membrane bound-Heredity or genetic information is organized into threadlike structures called chromosomes.-contains DNA-composed of nucleic acids and proteins – control centre of the cell – directs all cell activity-directs other cell activities. Cell Membrane -composed of proteins and…

Pesticides & Naled: Environmental Impact, Legislation, Costs

With environmentalists constantly searching for a safer insecticide to deal with those pesky mosquitoes, naled has often been the choice for many. Having been registered for use since 1959 in the United States, about one million pounds of the organophosphate pesticide have been used every year with seventy percent used towards mosquito control. Primarily produced…