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Biology Chapter 1

Biology by Sylvia S. Mader

What is Biology The scientific study of life.
All living things share...? The same basic characteristics.
Cell The basic unit of structure and function of all living things. Formed by molecules joining together.
Emergent Properties A property which a collection or complex system has, but which the individual members do not have. Ever changing.
Living things are... Organized.
Biosphere The zone of air, land, and water where organisms exist.
Ecosystem A community plus it's physical environment.
Community A collection of interacting populations within the same environment.
Population All the members of a species within and area.
Species A group of similar, interbreeding organisms.
Organism Formed when organ systems are joined together.
Organ Systems Formed by organs working together.
Organs Made up of tissues.
Tissues Formed by cells combining together.
Molecules Formed by atoms combining together.
Atoms The organization of life begins with atoms.
Life requires...? Materials and energy.
Energy The capacity to do work.
Metabolism All the chemical reactions that occur in a cell.
What is the ultimate source of energy? The sun.
Photosynthesis As process that converts solar energy into the chemical energy of carbohydrates.
What is a plant's metabolism? Photosynthesis
What flows from the sun? Energy
How are chemicals returned to living plants? As a result of death and decomposition.
Ecosystems are characterized by what? Chemical cycling and energy flow.
What cycles from the earth? (decomposers) Chemicals
Homeostasis The maintenance of internal conditions within certain boundaries.
What do living things maintain? Homeostasis
Stimuli When living things interact with the environment and respond to changes in the environment.
What reproduces and developes? Living things
What are genes composed of? DNA
When organisms reproduce, what do they pass on to the next generation? Genes
Adaptaion Any modification that makes an organism better able to function in a particular environment.
Evolution The change in a population of organisms over time to become more suited to the environment.
What explains the diversity and unity of life? The theory of evolution
What is the evolutionary mechanism proposed by Charles Darwin? Natural selection
What fuels natural selection? Mutations
Taxonomy The discipline of biology that identifies, names, and classifies organisms according to certain rules.
Systematics The study of evolutionary relationships between organisms.
List the classification categories from least inclusive to most inclusive. Species, genus, family, order, class, phylum, kingdom, and domain
Domain Archaea Contains unicellular prokaryotes that live in extreme environments probably similar to the primitive earth.
Prokaryotes lack what? A membrane-bound nucleus.
Domain Bacteria Contains unicellular and multicellular prokaryotes that live in all environments.
Domain Eukarya Contains unicellular and mulicellular eukaryotes.
Eukaryotes contain what? A membrane-bound nucleus.
Created by: ktippetts