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Janssen Bio Ch 1

Mrs. Janssen's Chapter 1 Biology Review

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
Created by: jjanssen33