Evolution is the main theme of Biology. All living organism that we know about are related to evolution. This is the only idea that makes sense and explain clearly about living things.
2) What are some properties of life?
- Response to the environment: Organisms detect and response to stimuli from their environment.
- Energy processing: All organisms must take in energy to grow, develop, reproduce and maintain its life.
- Reproduction: Living things reproduce which mean that they produce new organisms
3) What are the levels of Biological Organization?
- The Biosphere: includes most regions of land, bodies of water and the atmosphere.
- Ecosystems: consists of both living and non-living things of the environment.
- Communities: the society that living in the forest such as trees, a diversity of animal,... are a community.
- Populations: includes of all species living within a specific area.
- Organisms: Every individual living things are called organisms.
- Organs and Organ Systems: Organ are a part inside an organism. Its helps to carry out a particular function in the body.
- Tissues: group of similar cells that perform a particular function.
- Cells: Life most basic unit of structure and function.
- Organelles: a structure that performs important function in a cell.
-Molecules: a smallest unit that consisting of two or more chemical units called atoms.
Five Main Facts
- Life is what all living things do.
- The core theme of biology is evolution.
- We are able to reproduce based on a heritable information in the form of DNA.
- There are three domains of life: Bacteria, Archae and Eukarya.
- Biological Organization consists of 10 levels from the most simple to the most complex levels.
Diagram
This diagram represent the classify of life in an order. There are 8 levels and was organized from the most general to the most specify stage. This system is named Linnaen followed the name of the scientist who created it. Species that are closely related are placed in the same group.
Summary
Chapter 1 is mainly introduce about the study of life and biology. Throughout the chapter, the author was giving a lot of examples and facts to explain more about the concept. All living things have a common properties of life such as reproduction, growth and develop, energy processing,... Evolution is the core theme of biology. This is a very important thing that helps us to understand clearly about living organisms.
DNA(Deoxyribonucleic acid) is the substance of genes that is needed for living things to reproduce. Its main function is to transfer information from the parents to their offspring. The Linnaean system helps to organize the diversity of life. Its make it easier for us to understand which animals are related to other.
Video
http://www.youtube.com/watch?v=1biuNl90380
10 Key Terms
- Evolution: the process of change that has transformed life on Earth from its earliest beginnings to the diversity of organisms living today.
- Biology: the scientific study of life.
- Emergent properties: new properties that arise with each step upward in the hierarchy of life, owing to the arrangement and interactions of parts as complexity increases.
- Systems biology: to construct models for the dynamic behavior of whole biological systems
-DNA: the substance of genes, the units of inheritance that transmit information from parents to the offspring.
- Bioinformatics: the use of computational tools to store, organize, and analyze the huge volume of data that result from high-throughput methods.
- Hypothesis: a tentative answer to a well-framed question - an explanation on trial.
- Eukaryotic cell: a type of cell with a membrane-enclosed nucleus and membrane-enclosed organelles.
- Prokaryotic cell: a type of cell lacking a membrane-enclosed nucleus and membrane-enclosed organelles.
- Data: recorded observations.
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