Which of the following characteristics distinguish the archaea from the bacteria?
A) cell wall composition
B) ribosomal RNA (rRNA) sequences
C) the deoxyribonucleotides in the DNA
D) cytoplasmic membrane lipids
E) cell wall composition, cytoplasmic membrane lipids, and rRNA sequences
E
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According to the latest data, the global human population is predicted to
A) continue to increase exponentially for the next 50 years. B) peak at 10 billion. C) decline precipitously to 1 billion. D) increase at a steady rate for the next 50 years.
. Of the four types of T cells, only the ____________________ cells destroy infected body cells. Fill in the blank(s) with the appropriate word(s)
What factor is most likely to have caused the change in the number of bird species that occurred between years 30 and 60?
a. decreasing food supply b. increasing competition among bird species c. increasing number of bird habitats d. evolution of new bird species
Which molecule is used to fuel all energy dependent cellular processes?
a. ATP b. Protein c. Water d. Cytoplasm e. UV light