Which organ lies in the pelvic cavity?
a. stomach
b. bladder
c. liver
d. large intestine
e. heart
B
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Which pre-mRNA processing mechanism allows different proteins to be produced from the same DNA sequence?
a. transposition b. alternative splicing c. intron shuffling d. intron splicing e. open reading frame shuffling
Which are the main water-conducting tubes in angiosperms?
1.Phloem vessels 2.Xylem vessels 3.Trachaeids 4.Sieve tubes
Bacteria:a
are incapable of locomotion. b. move by means of pili c. move by means of cilia. d. move by means of a rotating flagella. e. move by means of a whiplike flagella.
Which of the following statements about plant development is true?
A. A single gene is responsible for the control of all root and shoot formation. B. Cells nearest to the suspensor ultimately form the root. C. The radial axis of the developing embryo develops before the root-shoot axis. D. Gibberellic acid is important in root-shoot axis formation. E. The MONOPTEROS gene (MP) stimulates chlorophyll synthesis in seeds.