Biology Chapter 1

The study and manipulation of DNA on a molecular level is known as __________

• biochemistry. 
• genomes. 
•  evolution.
• molecular genetics. 

During an experiment, which factors are observed and measured?

• dependent variables
• independent variables 
• constants
• hypotheses

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Scientists use observations and data to form and test ______________.

• constants
• hypotheses
• theories
• conclusions

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The variety of life across the biosphere is called ________. 

• biodiversity
• genomics
• homeostasis.
• ecology

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All the chemical processes used to build up or break down materials are called an organism’s ___________

• metabolism.
• homeostasis.
• adaptations.
• stimuli.

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What is the name given for genetic changes in living things over time?

• adaptation 
• homeostasis
• evolution
• negative feedback

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How have computer models expanded biological research? 

• They help scientists design better experiments.
• They simulate complex biological systems that cannot be studied directly.
• They give scientists the ability to observe molecules directly.
• They allow the use of human experimental subjects.

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Both of the processes shown in Figure 1.2 use and apply biological processes. Both processes are examples of

• biotechnology. 
• genomics.
• transgenic organisms.
• imaging technology.

Exploring how indoor air pollutants lead to respiratory problems is an example of using biology to _______________.

• develop biotechnology.
• monitor global change.
• improve human health.
• make ethical decisions.

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Similar organisms that can reproduce by interbreeding belong to the same _________.  

• ecosystem.
• environment.
• habitat.
• species