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Themes in the study
Mid term review
Term | Definition |
---|---|
Biology | is the scientific study of life. |
Properties of life include | 1. Order—the highly ordered structure that typifies life, |
2. | Reproduction—the ability of organisms to reproduce their own kind |
3. | Growth and development—consistent growth and development controlled by inherited DNA, |
4. | Energy processing—the use of chemical energy to power an organism’s activities and chemical reactions, |
5. | Regulation—an ability to control an organism’s internal environment within limits that sustain life, |
6. | Response to the environment—an ability to respond to environmental stimuli. |
7. | Evolutionary adaptation—the ability for individuals with traits best suited to their environments to pass on their traits. |
Biological organization unfolds as follows: | 1. Biosphere—all of the environments on Earth that support life |
2. | Ecosystem—all the organisms living in a particular area and the physical components with which the organisms interact, |
3. | Community—the entire array of organisms living in a particular ecosystem, |
4. | Population—all the individuals of a species living in a specific area |
5. | Organism—an individual living thing, |
6. | Organ system—several organs that cooperate in a specific function, |
7. | Organ—a structure that is composed of tissues, |
8. | Tissue—a group of similar cells that perform a specific function |
9. | Cell—the fundamental unit of life |
10. | Organelle—a membrane-enclosed structure that performs a specific function within a cell, |
11. | Molecule—a cluster of small chemical units called atoms held together by chemical bonds. |
In life's biological hierarchy properties emerge at each level. | Emergent properties are new properties that arise in each step upward in the hierarchy of life from the arrangement and interactions among component parts. |
Cells are the structural and functional units of life. Cells are the level at which the properties of life emerge | A cell can REGULATE its internal environment, TAKE IN and use energy, RESPOND to its environment, DEVELOP and maintain its complex organization, and GIVE RISE to new cells |
All cells | are enclosed by a membrane that regulates the passage of materials between the cell and its surroundings. And uses DNA as their genetic information. |
There are two basic forms of cells. | Prokaryotic cells, which were the first to evolve, are simpler, and are usually smaller than eukaryotic cells. |
And | Eukaryotic cells, which are found in plants, animals, fungi, and protists and are subdivided by membranes into various functional compartments, or organelles, including a nucleus that houses the DNA. |
Systems biology | Systems biology is the study of a biological system and the modeling of its dynamic behavior, ranging from the functioning of the biosphere to the complex molecular machinery of an organelle. |
Cells illustrate another theme in biology | the correlation of structure and function. Structure is related to function at all levels of biological organization |
Living organisms interact with their environments, which include | Living organisms interact with their environments, which include other organisms and physical factors |
In most ecosystems | -plants are the producers that provide the food, -consumers eat plants and other animals, and -decomposers act as recyclers, changing complex matter into simpler chemicals that plants can absorb and use. |
The dynamics of ecosystems include two major processes | the recycling of chemical nutrients from the atmosphere and soil through producers, consumers, and decomposers back to the air and soil and |
2 | the one-way flow of energy through an ecosystem, entering as sunlight and exiting as heat. |