Describe the mechanisms by which certain prokaryotes glide. What are the ecological advantages of gliding motility?
What will be an ideal response?
Answer: Mechanisms will vary depending on the organism described, some of which include the involvement of proteins in the cytoplasmic membrane, slime extrusion, and type IV pili. Examples of advantages could include biofilm formation on a surface, increased pathogenesis or movement towards a different habitat with new resources.
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Homologous recombination has been observed in
A) Archaea. B) Bacteria. C) Eukarya. D) Archaea, Bacteria, and Eukarya.
Which gland secretes sex hormones?
a. testis b. adrenal medulla c. thyroid d. kidney e. pancreas
Humans have ________ different types of autosomes.
A. 22 B. 44 C. 11 D. 23 E. 46
What is the significance of the minerals present in hydrothermal vents in the surface metabolism model of chemical evolution?
provided kinetic energy for the formation of organic molecules. B) The minerals helped catalyze the formation of organic molecules. C) The minerals helped nonpolar molecules dissolve in water. D) The minerals became incorporated into functional groups.