Certain groups of cells move inward from the surface of the blastula in a carefully orchestrated migration called what?
A. Morula formation
B. Blastulation
C. Archenteron formation
D. Gastrulation
E. Cleavage
Answer: D
You might also like to view...
How do fern sperm reach the archegonium for fertilization?
a. using multiple flagella to follow chemoattractants released by the archegonium b. unusually among vascular plants, it is the archegonium that seeks out the sperm c. they are ejected from the xylem in jets of water toward nearby gametophytes d. the fern sperm and archegonium develop within the same strobili
Surface tension of water is due to
a. ionic bonding. b. ionization of water. c. the ability of water to act as a solvent. d. hydrogen bonding. e. water molecules repelling each other.
Glucose monomers linked into a highly branched chain make up ____
a. glycogen b. cellulose
c. fructose d. starch e. sucrose
Aerobic bacteria in the genus ________ are metabolically diverse soil-dwellers which also cause opportunistic disease in cystic fibrosis patients.
A. Burkholderia B. Coxiella C. Enterobacter D. Prevotella E. Hafnia