BIO 101 Test 1
Why are viruses not considered to be living organisms?
Viruses do not contain genetic material. Viruses do not undergo evolution. Viruses do not have complex, well-ordered structures. Viruses do not have their own cells and they do not reproduce on their own. D
natural experiment
concentrations of the toxic chemical in the ponds were not controlled by the experimenter, but rather resulted from the chemical spill.
A(n) ___ involves running a test multiple times while changing one variable, leaving the others the same.
controlled experiment
A(n) ___ is a proposed explanation for a set of observations. It leads to predictions that can be tested by additional observations or by experiments.
hypothesis
Scientists use a general process known as the ___ to ask and answer questions about nature.
scientific method
manipulative studies
the researcher controls all the other variables in the experiment, so any health effects observed in the test subjects can be attributed to differences in the independent variable.
A(n) ___ is broader in scope than a hypothesis, is supported by a large body of evidence, and generates many new hypotheses.
theory
A property of all living things
Reproduces its own kindTakes in, converts, and expels energyComplex, but well-ordered, structureComposed of one or more cellsResponds to the environmentPopulations evolve over time
Not a property of all living things
Requires another individual to reproduceEats other organisms to gain energyComposed of many cellsIndividuals evolve over time