Answer the question using the accompanying figure. In the diagram of a root tip, the structure labeled "2" is the ____
a. quiescent center
b. zone of cell division
c. zone of elongation
d. root cap
e. zone of maturation
ANSWER: b
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Which of the following statements most accurately describes the inference that can be made regarding the possible functional significance of FoxP2 in the evolution of human language?
A. FoxP2 is a highly conserved transcription fact that is a "language gene". Changes in the function of this gene in the human lineage were the key event that allowed language to evolve. B. FoxP2 is a developmental gene with pleiotropic effects. Because this gene is highly conserved among a group organisms that are capable of acoustic communication it must be involved in the evolution of human language. C. FoxP2 is a highly conserved transcription factor. Because songbirds whose FoxP2 has been knocked out are less capable of learning new songs, this gene is likely involved in the evolution of human language. D. FoxP2 is a developmental gene that affects acoustic communication in a range of animal species. Because the human gene shows an elevated rate of non-synonymous to synonymous mutations in the human lineage, changes to the function of this gene in the humans may have contributed to the evolution of language.
The majority of energy resources taken from the sea are in the form of:
a. coal. b. energy from tides. c. gas and oil. d. energy from waves. e. thermal energy.
Microscopic reproductive cells produced by most fungi are
A. hyphae. B. fruiting bodies. C. spores. D. gills. E. mycelium.
The energy stored in the carbon-carbon bonds of glucose is an example of ___ energy.
a. kinetic b. potential c. chemical d. mechanical e. both b and c are correct