Some fish have bony fins. If the body of water they are in dries out, these fins can be used to help the fish "walk" to another body of water. In this context, bony fins are an example of ________
A) an exaptation
B) an adaptation
C) a macroevolutionary event
D) paedomorphosis
A
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The morphological features that a group of cells will eventually adopt is called the _______
A. positional information B. cell fate C. cell adhesion model D. embryogenesis
If a 1n egg is fertilized by a n-l sperm, the
resulting zygote will have
a. the chromosome number 2n?1. b. a chromosome without its homologue. c. a condition called monosomy. d. a genetic disorder. e. all of these conditions
Which organizational unit includes the fewest species of organisms?
a. class b. biosphere c. community d. population e. ecosystem
The gene encoding apolipoprotein B exists in two isoforms, APOB100 and APOB48. These two forms are produced as a result of
A. alternative splicing. B. tissue-specific expression. C. a gene mutation that results in a stop codon. D. RNA editing.