The values (e.g., 80 or 100) noted on the branches of an evolutionary tree reflect:
A. how similar an individual taxa is to the extinct ancestor at the node of the branch.
B. how similar an individual taxa is to the common ancestor at the root of the tree.
C. the confidence the investigator has in the information contained in that branch.
D. the percentage of species in that branch.
E. the number of genes used to determine the relationship displayed in the tree.
C
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In human lungs, where does gas exchange
occur?
a. the pharynx b. the alveoli c. the trachea d. the bronchioles e. more than one of these
Consider a cell that has four pairs of chromosomes. What is the number of possible chromosome orientations in that cell?
a. 4 b. 8 c. 16 d. 24 e. 32
What is the most specific taxonomic category?
What will be an ideal response?
The field of biological research in which biologists are attempting to create a living cell in the laboratory, essentially from scratch is known as __________. More modestly, this branch of biology also has a goal of developing novel life forms, beginning with existing organisms, that have a unique value in medicine, industry or in cleaning up the environment.
A) megalomeniacal biology B) industrial biology C) synthetic biology D) production-grade biology E) pharmaceuical biology