This is the levels of Biological Organization. The graph shows from biosphere whcih consists of all the environments on Earth that are inhabited by life. Later till the molecules whcih is a chemical structure consisting of two or more small chemical units called atoms. This graph basically shows the complex lives till the simple life form.
Main questions:
What is the order of Levels of Biological Organization?
Biosphere, Ecosystems, Communities, Populations, Organisms, Organs and Organ Systems, Tissues, Cells, Organelles and Molecules.
What is Reductionism?
The reduction of complex systems to simpler components that is more manageable to study.
What is the order of Dobzhansky’s statement?
Species, Genus, Family, Order, Class, Phylum, Kingdom and Domain.
5 main facts:
The flight muscles obtain energy in a usable from organelles called mitochondria.
A eukaryotic cell is subdivided by internal membranes into various membrane-enclosed organelles. In most eukaryotic cell, the largest organelle is the nucleus which contains the cell’s DNA. Other organelles are located in the cytoplasm, the entire region between the nucleus and outer membrane of the cell.
Prokaryotic cells are much simpler and generally smaller than eukaryotic cell. The DNA is not separated from the rest of the cell by enclosure in a membrane-bounded nucleus. Prokaryotic cells also lack the other kinds of membrane-enclosed organelles that characterize eukaryotic cells.
Hypothesis is a tentative answer to a well-framed question-an explanation on trial. It is usually an educated guess, based on experience and on the data available from discovery science. A hypothesis must be testable there must be some way to check the validity of the idea.
Evolution: the process of change that has transformed life on Earth from its earliest beginnings to the diversity of organisms living today.
Summary:
The First Chapter is basic start an introduction of what is biology. Biology is a quest, an ongoing inquiry about the nature life. It starts we how the life start on earth and what are the properties of life. Such as: order, Evolutionary adaptation, regulation and reproduction…etc.
Evolution is one of the most important processes for all the species on the earth. If there is no evolution then there won’t be such as diversity earth now. In this chapter also mentions how life forma started from small cell till the Biosphere. It also teaches us the methods of studying nature such as: inquiry and planning reasoning. Biology is not just a simple course but it involves chemistry and technology. So the question we should ask is “can we do it,” other than “should we do it.”
Key Terms:
1. Evolution: the process of change that has transformed life on Earth from its earliest beginnings to the diversity of organisms living today.
2. Biology: The scientific study of life.
3. Deductive reasoning-A type of logic in which specific results are predicted from a general premise.
4. Emergent properties:New properties that arise with each step upward in the hierarchy of life, owing to the arra gement and interactions of parts as complexity increases.
5. System bioligy:An approach to studying biology that aims to model the dynamic behavior of whole biological systems.
6. Inquiry:The search for information and explanation, often focused by specific questions.
7. Genome:The genetic material of an organism or virus; the complete complement of an organism’s or virus’s genes along with its noncoding nucleic acid sequences.
8. Eurkaryotic cell: is subdivided by internal membranes into various membrane-enclosed organelles.
9. Negative Feedback: A primary mechanism of homeostasis, whereby a change in a physiological variable triggers a response that counteracts the initial change.
10. Positive Feedback: A physiological control mechanism in which a change in a variable triggers mechanisms that amplify the change.
Video: http://www.youtube.com/watch?v=dc2C6LO3BDA
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