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BSC 1020 Exam 1 with complete solutions
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BSC 1020 Exam 1 with complete solutions
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BSC 1020 Exam 1List the seven characteristics of life as it is known on Earth. - correct answer ✔✔Cells, metabolism,
growth, reproduction, irritability, adaptation, movement
Rank the levels of life from atoms and molecules to the biosphere - correct answer ✔✔atoms,
molecules, organelles, cells, tissues, organ and organ system, organisms, population, community,
ecosystems, and biosphere
What is the difference between EUKARYOTES and PROKARYOTES? Classify each of the following
organisms as eukaryotic or prokaryotic: bacteria, Archea, protists, fungi, plants, and animals - correct
answer ✔✔eukaryotes are larger, more complex, nucleus is enclosed in a membrane, and contains many
types of organelles
prokaryotes are smaller, simpler structure, DNA is concentrated in nucleoid region without a membrane,
and lacks most organelles
What are the three domains of life? Which organisms belong to each domain? - correct answer
✔✔Bacteria, archaea, and Eukarya
Bacteria - prokaryotes
Archaea - prokaryotes
Eukarya - plants animals fungi
What are Darwin's two main observations and his inescapable conclusion? - correct answer
✔✔Observation - overpopulation and competition, and individual variation
Conclusion - unequal reproductive success
Compare and contrast natural and artificial selection - correct answer ✔✔Natural causes adaptation and
mechanism for evolution. It is used in survival
Artificial is by humans and we select instead of environment
, Compare and contrast discovery science and hypothesis-driven science - correct answer ✔✔Discovery
Science - describes observations and used inductive reasoning and seeks natural causes for natural
phenomenas
Hypothesis-driven science - explains a set of observations. uses scientific method, deductive reasoning
What are the steps of the scientific method? - correct answer ✔✔Observation, question, hypothesis,
prediction, experiment, conclusion
What is the difference between a scientific hypothesis, theory, and law? - correct answer ✔✔Hypothesis
- a proposed explanation for a set of observation
Theory - much broader in scope than a hypothesis, a comprehensive explanation for a large number of
observations and has varied and extensive evidence
Law - must always apply under the same condition, also implies a casual relationship
What is matter? What are its three physical states? - correct answer ✔✔Matter - Anything that has mass
and takes up space
Solid, liquid, gas
What is an element? How many elements occur naturally? How many are essential for life? Which 4
elements are most abundant in living things (including humans)? What are trace elements? - correct
answer ✔✔Element - substance that cannot be broken down any further
92 occur naturally
25 essential for life
Carbon, hydrogen, nitrogen, and oxygen
Trace elements - Elements that are important but not very abundant in the body: iodine, iron, fluorine
What are compounds? - correct answer ✔✔Compounds are substances that contain two or more
elements in a fixed ratio
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