The Science of Biology Chapter 1

What is Biology? The study of life (Greek word bios, meaning life and logos, meaning study

What characteristics do living creatures have in common? Properties of Life What characteristics do living creatures have in common?

Living creatures are ORGANIZED All made of the same collection of chemicals, but we are organized as… organelles & cells plant cells & animal cells plant cell animal cell

Living creatures are ORGANIZED All made of the same collection of chemicals, but we are organized as… organs & organ systems respiratory, circulatory, digestive, etc.

Living creatures RESPOND Respond to internal changes Homeostasis maintaining balanced conditions inside the body Respond to external changes

Living creatures use ENERGY Metabolism all the reactions your body performs to make & use energy eating & digestion & elimination of waste synthesis = building cellular respiration = making energy mitochondria

Living creatures GROW & DEVELOP Change over an individual’s life time get bigger mature so they can reproduce

Living creatures REPRODUCE Make the next generation Asexual-single parent Sexual- two parents (sperm and egg)

Living creatures EVOLVE Living things adapt and can evolve (change of time)

ORGANIZATION ORGANISM-anything that possesses all of these characteristics of life. SPECIES-organism that can interbreed and produce fertile offspring (if not leads to EXTINCTION)

Levels of ORGANIZATION

Levels of Biological Organization Biosphere-Earth

Scientific Inquiry: Thinking Like a Scientist Scientists collect data by making careful observations. An observation is a record or note made by studying something using the senses.

Data is information gathered through observations. An inference is a deduction or assumption based on observations and prior knowledge.

Inferences……

THE SCIENTIFIC METHOD

THE SCIENTIFIC METHOD Observation Hypothesis Experiment Collect Data Analyze Conclusion

Any Questions? Quick Review…

1. The process by which organisms keep their internal conditions relatively stable is called metabolism a genome evolution homeostasis

2. Which sequence illustrates the increasing complexity of levels of organization in multicellular organisms? (1) organelle → cell → tissue → organ → organ system → organism (2) cell → organelle → tissue → organ → organ system → organism (3) organelle → tissue → cell → organ → organ system → organism (4) cell → organism → organ system → organ → tissue → organelle

3. The diagram below represents levels of organization in living things. Which term would best represent X? human stomach (2) tissue (4) organelle

4. A housefly ingests raw garbage, digests it, and later egests some materials. With which life process are all of these events most closely associated? growth nutrition transport synthesis