Sugar is translocated in phloem from a source, or an area of __________, to a sink, or an area of
__________.
a. low sugar concentration; high sugar concentration
b. high sugar concentration; low sugar concentration
c. positive water potential; negative water potential
d. negative water potential; positive water potential
e. low pressure; equally low pressure
B
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Which type of plant hormone can be produced by boiling DNA?
a. salicylic acid b. auxins c. cytokinins d. abscisic acid e. jasmonates
Which organisms are called extremophiles and flourish mostly in extreme conditions?
A) Protozoans B) Archaea C) Bacteria D) Fungi
The polymerase chain reaction was developed by:
a. Francis Crick. b. Walter Gilbert. c. E.M. Southern. d. Kary Mullis. e. Leland Hartwell
Chordates are characterized by having a ________, a dorsal, flexible supportive rod.
Fill in the blank(s) with the appropriate word(s).