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Biology 121 Exam 1 questions and answers graded A+ 2024/2025
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Biology 121 Exam 1 questions and answers graded A+ 2024/2025
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Biology 121 Exam 1Hiearchy of life order
bio-eco-com-pop-organism-organ syst-organ-tissue-cell-organelle-molecule-atom /each step causes new
properties to emerge as result of interaction among lower level components
systems biology
model dynamic behavior of a whole biological systems based on a study of interactions among systems
parts
reductionism
complex systems broken down to simpler components that are more manageable to study
Energy
energy from sunlight-converted to chemical energy by producers-passed to consumers
cell
organisms basic unit of structure and function
eukaryotic cells
contain membrane-enclosed organelles including dna-containing nucleus
prokaryotic cells
lack dna containing nucleus or membrane
DNA
long linear polymer in the nucleus of cell formed from nucleotides and shaped like a double helix
transfers heritable info from parents to offspring
gene expression
conversion of the information encoded in a gene first into messenger RNA and then to a protein
genomics
study and comparison of genomes within a single species or among different species
positive feedback
Feedback that tends to magnify a process or increase its output. regulation common to life at all levels
which regulate biological systems
, natural selection
the principle that, among the range of inherited trait variations, those that lead to increased
reproduction and survival will most likely be passed on to succeeding generations
inquiry
scientists make observations by collecting data
inductive reasoning
drawing a general conclusion
hypothesis
a proposal intended to explain certain facts or observations
deductive reasoning
predictions that can be used to test hypotheses made from inductive reasoning
controlled experiments
designed to demonstrate effect of 1 variable by testing control groups and experimental groups that
differ in only that one variable
scientific theory
generated new hypotheses that is supported by large body of evidence
technology
method or device that applies scientific knowledge for some specific purpose that affects society
molecule
consists of atoms
organelle has
orderely arrangement of molecules
photosynthetic plant cells
contain organelles called chloroplasts
tissue
consists of a group of similar cells
population
set of organisms of the same spieces
community
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