The model of species selection is analogous to natural selection. In this analogy, ________ are like individuals within a population, and ________ is analogous to reproduction
A) major groups of organisms; extinction
B) species; speciation
C) genes; gene duplication
D) families; interbreeding
Answer: B
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Indicate whether the statement is true or false.
Cell differentiation _____
a. occurs in all complex multicelled organisms b. requires unique genes in different cells c. involves selective gene expression d. occurs in all complex multicelled organisms and involves selective gene expression e. all of these
Lipid A causes disseminated intravenous coagulation (DIC).
Answer the following statement true (T) or false (F)
Differences in chromosomal arrangements (such as inversions and translocations) between species can result in postzygotic isolation because:
a. hybrid zygotes die early. b. hybrids are inviable. c. hybrids are sterile. d. hybrids are behaviorally isolated from their parents.