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Rio Bio 156 Exam 1 with complete solutions
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Rio Bio 156 Exam 1 with complete solutions
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Rio Bio 156 Exam 1 with completesolutions
List features that distinguish living organisms from nonliving matter. - Answer -1.
Cellular basis - All living things consist of one or more cells
2. Requirement for energy and nutrients - Life is sustained by ongoing inputs of energy
and nutrients
3. Homeostasis - Living things sense and respond to change
4. DNA is hereditary material - Genetic information in the form of DNA is passed to
offspring
Describe the levels of organization in the living world. - Answer -Atoms → cells →
tissues → organs → organ systems → organism → population → community →
ecosystem → the biosphere
List the three domains of life and distinguish between each domain. - Answer -
Prokaryotes are bacteria and archaea.
Domain Bacteria: unicellular no nucleus
Domain Archaea: unicellular no nucleus but closer to eukarya
Domain Eukarya: have nucleus
List four kingdoms within the domain Eukarya and distinguish between them. - Answer -
1. Fungi can be single or multicellular but digest food outside their body.
2. Plants are multicellular and are photosynthetic.
3. Animals are multicellular and eat other organisms for nutrients.
4. Protists are the unicellular organisms that have a nucleus but do not fit any other
category.
List and describe the steps involved in solving a problem using hypothesis-based
science - Answer -observation
hypothesis
experimental
conclusion
Describe the concept "an organism is more than the sum of its parts." - Answer -
organism is part of a more complex organization. These emergent properties go beyond
itself.
, By definition, distinguish between a population, a community, and an ecosystem. -
Answer -1. Population: multiple organisms in a single spot
2. community: is made up of populations of different organisms
3. ecosystem: is the interactions between the community and the non-living
environment that surrounds it
Distinguish between a producer, a consumer and a decomposer. - Answer -
producer:photosynthetic organisms that trap light and convert that light energy into
chemical bond energy. such as some bacteria, protists, and all plants
consumer: organisms that feed on already-stored food
decomposer: bacteria and fungi recycle the dead molecules throughout the bioshpere.
Distinguish between a hypothesis and a prediction. - Answer -hypothesis: testable
explanation of a natural phenomenon.
prediction: statement based on hypothesis about a condition that should exit if the
hypothesis is correct.
What is meant by the phrase potentially falsifiable hypothesis? - Answer -a hypothesis
can be proven that is false
Define the term control group and explain the value of a control group in an experiment.
- Answer -Group of individuals identical to an experimental group except for the
independent variable under investigation
To provide a basis of comparison to the experimental group
Define the term theory and explain the point in which a hypothesis becomes a theory. -
Answer -Suppose a hypothesis stands even after years of tests.
It is consistent with all data ever gathered, and it has helped us make successful
predictions about other phenomena.
Explain how electron configuration influences the chemical properties of an atom. -
Answer -Each cloud can hold a determinant number of electrons. When the electron
number changes, ions are formed. The number of electrons influences the bonding
between atoms.
hydrogen bond - Answer -The electron from the hydrogen spends most of its time
around the oxygen atom creating a partial positive charge on each hydrogen. The
presence of additional electrons makes the oxygen partially negative.
covalent bond - Answer -two atoms share a pair of electrons, so that each atom's
vacancy
becomes partially filled
ionic bond - Answer -Type of chemical bond in which a strong mutual attraction links
ions of opposite charge.
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