click below
click below
Normal Size Small Size show me how
Janssen Bio Ch 1
Mrs. Janssen's Chapter 1 Biology Review
Question | Answer |
---|---|
What do scientists use scientific thinking to test? | hypotheses |
Biodiversity generally increases from what? | poles to equator |
All of the chemical processes in an organism are known as what? | metabolism |
What is a biosphere? | living things and their environment |
What is biodiversity? | variety of organisms |
What is a species? | Closely related group of organisms that reproduces |
How many new species are discovered each year? | 10,000 |
How many species are estimated to become extinct each year? | 50,000 |
Who developed the first classification system for living organisms? | Aristotle |
Who explored the human body by dissecting corpses (dead bodies)? | Vesalius |
When was the microscope invented? | 1600's |
What development replaced the idea that living things could arise from non-living matter? | Cell Theory |
What is an organism? | individual living thing |
What is a cell? | basic unit of life |
What is the term for single celled organisms? | unicellular |
What is the term for organisms that are made of many cells? | multicellular |
What do all organisms need to carry out life processes? | energy |
What are the physical factors in the environment that organisms respond to? | stimuli |
What is DNA? | genetic material |
What is a system? | organized group of related parts |
What is an ecosystem? | community of organisms and their environment |
What does structure determine? | function |
What is homeostasis? | stable internal environment |
What is negative feedback? | response that returns a system to normal |
What is evolution? | change over time |
What is an adaptation? | inherited trait that give an advantage to an organism |
Qualitative data is based on what? | descriptions, appearance |
Quantitative data is based on what? | numbers, measurements |
What is an observation? | collecting information through senses |
What is a hypothesis? | proposed answer |
What do scientists use to test hypotheses? | experiments |
What are constants? | things that do not change |
What are variables? | things that do change |
What is a theory? | proposed explanation |
What is accuracy? | how close a measurement is to the accepted value |
What is precision? | how close together a set of measurements are to each other |
When were electron microscopes first developed? | 1930's |
What might an MRI be able to show that an X-ray cannot? | soft tissue |
What is the study of how diseases spread? | epidemiology |
What is a gene? | segment of DNA |
What are transgenic organism? | organisms with genes from more than one species |