Large amounts of extracellular material are characteristic of
A) simple epithelium.
B) loose connective tissue.
C) smooth muscle.
D) nervous tissue.
E) stratified epithelium.
B
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Angiosperms possess many adaptations. Which of the following statements is not true of angiosperms relative to other groups of plants?
A. Angiosperms have xylem vessels. B. Angiosperms rely entirely on tracheid xylem. C. Angiosperms have much higher rates of CO2 uptake than other groups of plants. D. Angiosperms transformed the terrestrial environment due to their metabolic activities. E. Angiosperms can support greater rates of photosynthesis and transpiration than other groups of plants.
Which of the following steps occurs third during yeast Ty element transposition?
A. packaging of RNA in a VLP along with reverse transcriptase, a protease, and integrase B. transport of Ty RNA into the cytoplasm where it is translated into VLP proteins C. transcription of Ty element in the nucleus D. "infection" of nucleus with VLP E. Conversion of mRNA into double-stranded DNA with reverse transcriptase
The enzyme formate dehydrogenase (FDH) splits formic acid to H2 and CO2 and is crucial to survival during fermentation because if fermentive intermediates were allowed to accumulate within the cell, the internal pH would become far too ________ to support viability.
A. alkaline B. hypotonic C. acidic D. hypertonic
Bacteria in the intestinal tract assist their hosts by ____
a. helping with digestion b. eating other bacteria c. producing minerals reptiles cannot d. producing stomach acid e. encouraging the growth of pathogens