Biology- The study of life

Science- the approach to understanding the natural world that is based on inquiry

Discovery science- describing nature

Hypothesis driven science- explaining nature

Discovery science- describes life at many levels from ecosystems down to cells and molecules

Hypothesis- a non-definite explanation for something that’s observable, or an educated guess for a possible cause for something

Scientific theory- a tested explanation for a set of proven hypotheses

Scientific method:

• Observation

• Question

• Create hypothesis

• Test hypothesis

• Results

• Draw conclusions

• Communicate results

Properties of life:

• Order- organisms are highly organized coordinated structures that have one or more cells

• Homeostasis- organisms have multiple regulatory mechanisms to maintain internal condition, internal functions, and cope with environmental stress for survival

• Growth and development- growth results in the addition of mass to an organism, and the formation of new cells and structures

• Energy processing- All organisms use a source of energy for their metabolic activities

• Response to environment- movement towards a stimulus is a positive response, movement away from a stimulus is a negative response

• Reproduction- organisms can reproduce

• Evolution- process where different kinds of living organisms are develop and diversify from their predecessors

Biosphere- highest level of life

Cell- lowest level of life

Biotic organisms- living things

abiotic organisms- nonliving things

ecology- study of ecosystems

dynamics of an ecosystem- recycling of chemical nutrients and unidirectional flow of energy

food chain- how every living thing gets food and how nutrients and energy are passed from creature to creature

prokaryotic cells- simple and smaller, has no nucleus, in bacteria

eukaryotic cells- larger and more complex, has a nucleus, in plants and animals

3 domains of life: bacteria, archaea, eukarya

bacteria and archaea have- prokaryotic cells

eukarya have- eukaryotic cells

eukarya include- plants and animals

• kingdom plantae(plants): uses photosynthesis

• kingdom fungi (fungi): are decomposers

• kingdom animalia (animals): eat to get energy

• protists (multiple kingdoms, single celled

  evolution- change in animals overtime

  charles darwin theory of evolution- animals evolved from their predecessors

  natural selection- animals who adapt the best survive

  artificial selection- selective breeding by humans