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Biology 1002B Lecture Notes - Alanine, Homochirality, Rna World

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School
Western University
Department
Biology
Course
Biology 1002B
Professor
Tom Haffie

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Document Summary

Display order: arranged in a highly ordered manner, cell: fundamental unit of life. Harness & utilize energy: acquire energy from the environment and use it to maintain state. Reproduce: have the ability to make more of their own kind. Respond to stimuli: can make adjustments to their structure, function and behavior in response to changes to external environment. Exhibit homeostasis: regulate internal environment so that conditions stay relatively constant. Increase their size by increasing the size/number of cells. Evolve: populations change over generations to become better adapted to the environment. Cell theory: all organisms are composed of one or more cells, the cell is the smallest unit that has the properties of life, cells arise only from the growth and division of preexisting cells (age of earth) Bacteria and eukarya used to be grouped together as prokaryotes. Life evolved within 600 million years, pretty fast on a geological stage, especially given that the earth had to cool down.

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Related Questions

what do the regulatory mechanisms of the body do? a) maintain absolute constancy of the internal environment b) function to accelerate changes in the internal environment c) operate independently of the internal condition of the body d) work to maintain a dynamic constancy of the internal environment

two populations of different endothermic species evolved in different enviroments. One species evolved in an environment of variable seasonal temperatures: high summer temperatures and low winter temperatures. the other species evolved in a relatively constant 20 degrees Celsius environment. Supposed both populations were subjected to a new environmental temperature. Which species would be better adapted to the new conditions?

Please Help. Thank you very much.

Ecology is the study of how organisms interact with their environment. Thus, a central question in ecology concerns how organisms respond to environmental variation. The flip side of this question is to ask whether the variation in characteristics of organisms is the result of variation in features of the environment. This variation can occur in space or through time.

1. Make a list of all the environmental variables that you can think of that are likely to be important to organisms. Think about plants and microbes as well as animals.

1A. One environmental change of great concern to us is climate change, specifically the prospect of human-caused global warming, a topic to which we will return. How do organisms respond to this spatial and temporal variability in the environment?