The age structure diagram for countries with a
2.1 total fertility rate is indicated by
a. A.
b. B.
c. C.
d. D.
e. none of these
C
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Conserved indels are
A. a type of transposable sequence characteristic of particular genus and useful for taxonomic analysis. B. sequences in eukaryotic mRNAs that are removed by RNA splicing. C. sequences of protein coding genes that are found altered in related species due to their tendency to accumulate small deletions. D. a type of signature sequence particularly useful for phylogenetic analysis.
Unlike plant cells, animal cells move during development. Which of the following terms describes the reorganization of undifferentiated cells that results in the formation of an embryonic structure with multiple layers?
A. blastulation B. gastrulation C. organogenesis D. cleavage
Which of the following fungal groups is the cause of widespread mortality in amphibians?
A. chytrids B. zygomycetes C. glomeromycetes D. ascomycetes E. basidiomycetes
The bud stage of tooth development describes which of the following events?
A. Dentin secretion begins. B. Odontoblasts differentiate from jaw mesenchyme. C. Oral ectoderm invaginates into the mesenchyme of the jaw. D. Permanent teeth begin to extrude the deciduous teeth. E. The enamel knot disappears.