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Biologyassessment #1

Levels of Organization, Characteristics of Life and Experimental Design

TermDefinition
What is the smallest unit of life? Cell
Living things are made of? Cells (one or more)
2 parents Sexual
1 parent (ex. binary fission) Asexual
What is the genetic code? DNA
How do we grow? Increase/change in cells
What is metabolism? Chemical reactions (building & breaking)
What is a stimulus? A signal to which an organism responds to
Homeostasis (ex. shivering when its cold) We react to remain stable
Do humans change quickly? No, we evolve over many generations as a population (evolution)
Atom (ex. Oxygen, Hydrogen, Nitrogen) Smallest unit of all matter
Molecule (ex. H20 & O2) Atoms held together by a bond
Organelle (ex. Ribosomes, Nucleus, Chloroplast) "Little organs", perform job in cell
Tissue (ex. Muscle tissue) Cells working together to do a certain job
Organ Tissues working together
Organ system Organs working together
Organism One living thing
Population (species) Same type of organism in one area
Community (ex. Zoo) Different populations in an ecosystem
Ecosystem All biotic & abiotic in one area
Biome Ecosystems with same climate
Biosphere All biomes on earth
What are the levels of organization in order? atoms, molecules, organelles, cells, tissues, organs, organ systems, organism, population, community, ecosystem, biome, biosphere
What is a hypothesis? An educated predicton
What is an independent variable? A variable manipulated on purpose
What is an dependent variable? A variable that responds to independent variable
Control The standard group not tested on in an experiment, done for comparison
Constant a factor kept the same in all trials
Why do we repeat experiments? To ensure the result is reliable
Quantitative data Data that can be expressed with numbers
Qualitative data Data that is not in numerical form
Created by: arianacontreras
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