Gene Ontology Analysis of the Embryonic Transcriptome. (a) GO term enrichment analysis from DAVID. Barplots (i) Stage 12, (ii) Stage 16, (iii) Stage 30 show stage-specific significant Biological Processes and their -log P-values plotted on x-axis. (b) A plot to cluster and visualize DAVID-derived GO terms from developmental stages 9, 12, 16 and 30 using R package clusterProfiler with a p-value cut off < 0.01 . The DAVID GO terms have been derived from biological process annotation of Xenopus tropicalis genes.