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unit 1 chap 1

bio123

QuestionAnswer
DNA is composed of building blocks called nucleotides
In eukaryotic cells DNA has the appearance of a double helix
What is the correct order for the hierarchy of biological organization from the least to the most complex? molecule, organelle, cell, tissue, organ, organ system, organism, population, community, ecosystem
Protists and bacteria are grouped into different domains because protists have a membrane-bounded nucleus, which bacterial cells lack
The universal genetic language of DNA is common to virtually all organisms on Earth, however diverse. What is the best explanation for this fact?
investigators try to control all of the variables except one—the one that tests the hypothesis. Which of the following reasons is the primary rationale for controlling variables in an experiment?
In order for a hypothesis to be able to be used in science
Created by: gtaine
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