Bio Study Guide I

Bio Study Guide I - 1. Seven properties of life are i....

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1. Seven properties of life are – i. Order - All other characteristics of organism emerge from an organism’s highly ordered structure. ii. Reproduction - Organisms will reproduce their own kind; life comes from life. iii. Regulation – Precise regulation of enzymes allow cells to respond to changing conditions and needs. The internal environment of organism is maintained even though the external environment may fluctuate. Homeostasis is an example of regulation. iv. Evolutionary Adaptation - Organisms will evolve due to changes in environment and interaction with other organisms. v. Response to the environment - Organisms will respond to stimuli. vi. Growth and Development – Heritable programs in the form of DNA direct the pattern of growth and development producing and organism that is characteristic of its species. vii. Energy Processing – Organisms take in energy and transform it to do many kinds of work. 2. The ten level of biological organizations are – i. Atoms - is a basic unit of matter consisting of a dense, central nucleus surrounded by a cloud of negatively charged electrons. ii. Molecules - are the simplest structural unit of elements or compounds which contain at least two atoms in a definite arrangement held together by bonds. iii. Organelle - is a specialized subunit within a cell that has a specific function, and is usually separately enclosed within its own lipid bilayer. iv. Cell - is a structural and functional unit of life. v. Tissues - A tissue is an ensemble of cells, not necessarily identical, but from the same origin, that together carry out a specific function. vi. Organs and organ systems - Organ is a collection of tissues joined in structural unit to serve a common function. Organ system is a group of organs that work together to perform a certain task. vii. Organisms – are living things that have the ability to act or function independently. viii. Population – people who inhabit a territory. ix. Communities - a group of people living in a particular local area. x. Ecosystem – is an ecological community together with its environment, functioning as a unit. 3. The seven themes that unify biology are – Evolution is overall theme – Evolution explains both the unity and diversity of life. Darwin’s theory of natural selection accounts for adaptation of populations to
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their environment through the differential reproductive success of varying individuals. Emergent properties – With each step upward in organizational level, novel properties emerge as a result of interactions among components of lover levels. Interactions with the environment – Organisms are open systems that exchange materials and energy with the surroundings. The interaction includes both living and non – living factors. Structure and function are correlated – Form and functions are co-related in all
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This note was uploaded on 02/23/2011 for the course BIO 109 taught by Professor Dr.pulting during the Fall '99 term at Maryland.

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Bio Study Guide I - 1. Seven properties of life are i....

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