PRAXIS CRAM - BIOLOGY 5236 LATEST UPDATE GRADED A+

PRAXIS CRAM - BIOLOGY 5236 LATEST UPDATE GRADED A+ Pros of stem cell research Curing genetic diseases Growing skin for burn victims Growing new organs Cons of stem cell research Harvesting embryonic stem cells kills the embryo, what constitutes a viable embryo? Cons of genetically modified foods Man should not interfere, allergens, modifications not contained-could pass in to wild species Cons of cloning - reduced gene pool - animals less healthy - worries that humans could be cloned and born with severe health problems Pros of cloning - used for medical research - Therapeutic cloning - Can save endangered species concerns of genetic testing Is it a medical test? Some do not want to know, privacy (who keeps results?), philosophical (do genes determine behavior?) scientific theory a well-tested concept that explains a wide range of observations scientific fact a direct and repeatable observation of any aspect of the natural world Hypothesis A testable prediction, often implied by a theory An educated guess scientific law A statement that describes what scientists expect to happen every time under a particular set of conditions scientific model a representation of an object or event that can be studied to understand the real object or event Scientific Method A series of steps followed to solve problems including collecting data, formulating a hypothesis, testing the hypothesis, and stating conclusions. sig fig rules 1) non-zero digits and zeros in-between them are sig figs 2) leading zeros (0.04) are not sig figs 3) trailing zeros with a decimal are sig figs (without a decimal are not greenhouse effect Natural situation in which heat is retained in Earth's atmosphere by carbon dioxide, methane, water vapor, and other gases greenhouse gases Gases such as carbon dioxide, methane, nitrous oxide, water vapor, and ozone in the atmosphere which are involved in the greenhouse effect. ozone depletion thinning of Earth's ozone layer caused by CFC's leaking into the air and reacting chemically with the ozone, breaking the ozone molocules apart free radicals chemical particles with