During the major event of development called __________, cells of the blastula start to migrate and form germ layers.
Fill in the blank(s) with the appropriate word(s)
Answer: Gastrulation
You might also like to view...
What is the correct progression of steps for a direct-sequencing experiment?
A) Lyse cells, purify DNA, amplify genes by PCR, and insert genes into plasmid. B) Lyse cells, insert genes into plasmid, purify DNA, and amplify genes by PCR. C) Lyse cells, insert genes into plasmid, amplify genes by PCR, and purify DNA. D) Purify DNA, amplify genes by PCR, lyse cells, and insert genes into plasmid.
Which of the following is TRUE of ligand-gated ion channels?
A. They bind ions with high affinity. B. They tend to allow any ion to pass through the channel. C. The intracellular domain of the channel contains the binding site for the ligand. D. They open upon binding the ligand to allow specific ions to pass through them. E. Ligand binding closes the channels preventing further ion passage through the channel.
Mitochondrial Eve was
A) fossil evidence of the Biblical Eve. B) a figurative first woman who had a mtDNA sequence that could have given rise, by mutation, to all modern human mtDNA. C) a hominid who had features of both australopithecines and Homo. D) a famous female paleontologist who has studied several fossil hominids in Ethiopia.
Many cells of the immune system have receptors that detect peptidoglycans and lipopolysaccharides. How do pathogenic bacteria avoid detection?
A. Pathogenic bacteria lack cell walls. B. Disease is only possible if the immune system has been compromised by some other event. C. Peptidoglycans are absent from pathogenic bacteria. D. Pathogens often encase themselves in a gelatinous capsule.