Biology 2e OpenStax Study Guide Practice Questions Answers PDF Download

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,Chapter 1: The Science of Life H H H H H




1.Which characteristic is common to all living organisms?
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A.Ability to move voluntarily H H H


B.Presence of a nucleus H H H


C.Ability to reproduce H H


D.Presence of chloroplasts H H




Answer: C. Ability to reproduce
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Rationale: All living organisms share fundamental characteristics, including repr
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oduction, metabolism, growth, and response to stimuli. While not all organisms ha
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ve a nucleus (prokaryotes lack one) or chloroplasts, reproduction is universal.
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2.Which level of biological organization is correctly arranged from simplest to
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Hmost complex?
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A.Organ → Cell → Tissue → Organ System
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B.Cell → Tissue → Organ → Organ System
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C.Tissue → Cell → Organ → Organ System
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D.Organism → Organ System → Organ → Tissue
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Answer: B. Cell → Tissue → Organ → Organ System
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Rationale: Biological organization progresses from simple to complex: cells for
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m
Htissues, tissues form organs, organs work in organ systems, and organ systems fu
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nction in organisms.
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3.Homeostasis is best described as: H H H H


A.The ability to produce energy
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B.Maintaining a stable internal environment H H H H


C.The process of evolution
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D.The creation of new species
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Answer: B. Maintaining a stable internal environment
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Rationale: Homeostasis is the regulation of internal conditions such as temperatu
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re, pH, and fluid balance, despite changes in the external environment.
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,4.The primary molecule for storing genetic information is:
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A.Carbohydrates
B.Lipids
C.DNA
D.Proteins
Answer: C. DNA H H


Rationale: DNA (deoxyribonucleic acid) contains hereditary information that gui
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des growth, development, and reproduction in all living organisms.
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5.Evolution explains: H


A.How individual organisms adapt during their lifetime
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B.How populations change over generations
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C.The immediate response of an organism to stimuli
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D.The process of cellular respiration
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Answer: B. How populations change over generations
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Rationale: Evolution is the process by which populations of organisms change geneti
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c ally over time due to natural selection, mutation, and other mechanisms.
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6.Which of the following is a prokaryotic organism?
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A.Amoeba
B.Bacterium
C.Algae
D.Yeast
Answer: B. Bacterium H H


Rationale: Prokaryotic cells lack a nucleus and membrane-
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bound organelles, which is characteristic of bacteria. Amoebas, algae, and yeast ar
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e eukaryotic.
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7.Which of the following best illustrates an emergent property?
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A.Chlorophyll in plants absorbing sunlight
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B.Water molecules forming liquid
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, C.Heart pumping blood as part of the circulatory system
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D.DNA replication H




Answer: C. Heart pumping blood as part of the circulatory system
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Rationale: Emergent properties arise when individual components interact to form
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a system with new functions. The heart alone cannot pump blood until organized i
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nto a system.
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8.Which scientific method step involves forming a testable statement?
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A.Observation
B.Hypothesis
C.Experiment
D.Conclusion
Answer: B. Hypothesis H H


Rationale: A hypothesis is a testable statement predicting a relationship between vari
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a bles, based on prior observations.
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9.Which of these is an example of adaptation?
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A.A plant wilting due to lack of water
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B.Polar bears having thick fur in Arctic regions
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C.A human learning to swim
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D.Bacteria dying from antibiotics H H H




Answer: B. Polar bears having thick fur in Arctic regions
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Rationale: Adaptations are inherited traits that increase survival and reproduction
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in specific environments.
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10.The process by which organisms maintain internal conditions despite external
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Hchanges is called: H H


A.Photosynthesis
B.Homeostasis
C.Metabolism
D.Evolution