Mobile DNA elements are more common in the genomes of
A) Archaea.
B) hyperthermophiles.
C) rapidly evolving species.
D) pathogens.
Answer: C
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A new organism was identified that contained arsenic in place of phosphate in its DNA double helix structure. Based upon this information alone, it can be determined that this change will greatly alter the information encoded by this genetic material.
Answer the following statement true (T) or false (F)
Animal bodies are organized along the ____________ axes.
A. dorsoventral, anteroposterior, and left-right B. dorsoventral, cranioposterior, and right-left C. dorsoventral, anteroposterior, and segmented D. dorsoventral, cranioposterior, and segmented E. apicalventral, anteroposterior, and right-left
Which of the following terms is LEAST related to the other terms?
a) oxygen. b) stomata. c) carbon dioxide. d) transpiration.
A microbiology student sampled a drinking fountain and observed small round colonies growing on his nutrient agar after incubating the plate for 48 hours. He made a slide from one of the colonies growing on the plate. He looked at the slide under the light microscope and noticed that none of the cells had nuclei. Based on this information, what can he determine concerning the colonies growing on his plate?
A) They are bacterial colonies B) They are fungal colonies C) Without staining, there is not enough information to make any determinations