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Ch. 1 - Evolution, the Themes of Biology, and Scientific Inquiry
Campbell - Campbell Biology 12th Edition
Urry12th EditionCampbell BiologyISBN: 9785794169850Non è quello che usi tu?Cambia libro di testo
Tutti i libri di testoUrry 12th EditionCh. 1 - Evolution, the Themes of Biology, and Scientific InquiryProblema 3
Capitolo 1, Problema 3

Which of the following best demonstrates the unity among all organisms?
a. Emergent properties
b. Descent with modification
c. The structure and function of DNA
d. Natural selection

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Begin by understanding the concept of 'unity among all organisms'. This refers to the common characteristics or features shared by all living things.
Consider the role of DNA in living organisms. DNA is the molecule that carries genetic information in all living cells, and its structure and function are consistent across diverse species.
Reflect on how DNA's structure, a double helix, and its function, encoding genetic information, are fundamental to all life forms. This universality suggests a common ancestry.
Compare DNA with other options like emergent properties, descent with modification, and natural selection. Emergent properties refer to new attributes of a whole that arise from the interaction of its parts, while descent with modification and natural selection are processes of evolution.
Conclude that the structure and function of DNA best demonstrate the unity among all organisms, as it is a universal feature present in all life forms, indicating a shared evolutionary origin.

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Emergent Properties

Emergent properties refer to new attributes of a complex system that arise from the interaction and integration of its parts. In biology, this concept illustrates how complex traits and functions emerge from simpler biological components, such as cells forming tissues, which then form organs, demonstrating unity in the complexity of life.
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Emergent Properties

Descent with Modification

Descent with modification is a fundamental concept of evolutionary biology, describing how organisms evolve over generations through changes in genetic material. This concept highlights the unity among organisms by showing how all species are connected through common ancestry, with modifications leading to diversity over time.
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Descent With Modification

Structure and Function of DNA

The structure and function of DNA are central to understanding biological unity, as DNA is the universal genetic material found in all living organisms. Its double-helix structure allows for replication and transmission of genetic information, ensuring continuity and unity in the biological processes across diverse life forms.
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Discovering the Structure of DNA
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Domanda del libro di testo

Which of the following statements best distinguishes hypotheses from theories in science?

a. Theories are hypotheses that have been proved.

b. Hypotheses are guesses; theories are correct answers.

c. Hypotheses usually are relatively narrow in scope; theories have broad explanatory power.

d. Theories are proved true; hypotheses are often contradicted by experimental results.

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Which of the following is an example of qualitative data?

a. The fish swam in a zigzag motion.

b. The contents of the stomach are mixed every 20 seconds.

c. The temperature decreased from 20°C to 15°C.

d. The six pairs of robins hatched an average of three chicks each.

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All the organisms on your campus make up

a. An ecosystem

b. A community

c. A population

d. A taxonomic domain

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A controlled experiment is one that

a. Proceeds slowly enough that a scientist can make careful records of the results.

b. Tests experimental and control groups in parallel.

c. Is repeated many times to make sure the results are accurate.

d. Keeps all variables constant.

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Systems biology is mainly an attempt to

a. Analyze genomes from different species.

b. Simplify complex problems by reducing the system into smaller, less complex units.

c. Understand the behavior of entire biological systems by studying interactions among their component parts.

d. Build high-throughput machines for the rapid acquisition of biological data.

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