What are mobile genetic elements, and how do they affect host organisms?
What will be an ideal response?
Mobile genetic elements are genomic parasites that spread within genomes to increase their own fitness. They sometimes have deleterious consequences, although they often have no discernible effect on the phenotype or fitness of the host genome. Mobile elements can affect host phenotypes but are rarely beneficial to hosts.
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The internal solute concentrations of osmoregulators are:
A. either higher or lower than the solute concentration of the external environment. B. similar to the solute concentration of the external environment. C. higher than the solute concentration of the external environment. D. lower than the solute concentration of the external environment. E. None of the answer options is correct.
Although exceptions do exist, which is a distinctively amphibian trait?
A) Juveniles have gills, and adults have lungs. B) Respiration occurs through the skin. C) Skin is smooth with no scales, feathers, or hair. D) All of these are distinctive amphibian traits.
Multiple nuclear divisions without cytoplasmic divisions result in cells called
a. mycoses. b. coenocytes. c. haustoria. d. pseudohypha
Which of the following is considered most closely related to land plants?
A. Red algae B. Chlorophytes C. Charophytes D. Trypanosomes E. Brown algae