Suppose an efficient conducting system evolved in a moss that could transport water and other materials as high as a tall tree. Which of the following statements about "trees" of such a species would be FALSE?
A) Fertilization would probably be more difficult.
B) Spore dispersal distances would probably increase.
C) Females could produce only one archegonium.
D) Individuals would probably compete more effectively for access to light.
C
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What is the function of the ? subunit of E. coli RNA polymerase in transcription?
A. It contains the polymerase active site. B. It contains the separate exonuclease site required for proofreading. C. It directs the polymerase to bind a specific type of promoter sequence. D. It signals the polymerase to terminate transcription at specific sites. E. It allows template-independent RNA synthesis.
Members of the ____ phylum have a unique water vascular system connected to tube feet that are used for movement
a. Hemichordata b. Echinodermata c. Cnidaria d. Arthropoda e. Chordata
Which statement is true for most steroid hormones?
a. They dissolve readily in the blood. b. They have no trouble entering their target cells. c. They find and react with surface receptor molecules. d. They cannot easily enter a target cell. e. They developed from amino acids.
Which of the following is MOST likely to be vaccinated against Bacillus anthracis?
a. cattle b. farm dog c. livestock worker d. wool sorter