Trait SpeciesABCDE111011211010311100410000511100611011The table shows the distribution of traits (A-E) in six extant species (1-6). A "0" indicates the ancestral condition, while "1" indicates the derived condition. Which trait is least informative of phylogenetic relationships within the group?
A. A
B. B
C. C
D. D
E. E
Answer: A
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a. always identical because they result from meiosis b. always identical because they result from mitosis c. sometimes identical because they result from meiosis d. sometimes identical because they result from mitosis e. never identical because they result from meiosis
Blood types (A, B, and O) are controlled by
a. sex-linked genes. b. linked genes. c. multiple genes. d. multiple alleles. e. single alleles.
Most plants incorporate carbon dioxide into sugars by means of a cycle of reactions called the
A. Krebs cycle. B. carbon cycle. C. CAM cycle. D. Calvin cycle.
Eukaryotes require more complex methods of gene regulation than prokaryotes because:a
eukaryotes have more operons than prokaryotes. b. transcriptional regulation is the only form of gene regulation in eukaryotes. c. all eukaryotic genes are constitutive. d. eukaryotes have more genes. e. individual genes must be regulated differentially in each cell type.