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RIO BIO 156 EXAM 1 LATEST ACTUAL EXAM ALL 150
QUESTIONS AND CORRECT DETAILED ANSWERS
ALREADY GRADED A+
List features that distinguish living organisms from nonliving matter. - ANSWER-1. Cellular basis
- All living things consist of one or more cells
- Requirement for energy and nutrients - Life is sustained by ongoing inputs of energy and
- Homeostasis - Living things sense and respond to change
- DNA is hereditary material - Genetic information in the form of DNA is passed to offspring
nutrients
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
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2 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.
- Plants are multicellular and are photosynthetic.
- Animals are multicellular and eat other organisms for nutrients.
- 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
- ecosystem: is the interactions between the community and the non-living environment that
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surrounds it
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3 Distinguish between a producer, a consumer and a decomposer. - ANSWER- 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. 3 / 4
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4 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.
Describe how water contributes to the fitness of the environment that supports all life. - ANSWER-1. an excellent solvent
- has cohesion (insect on water, water roots)
- stabilize temperature (cool surface)
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