Which two extinction risks may be a direct result of the pet trade?
a) climate change and exotic species introduction
b) habitat loss and overharvesting
c) overharvesting and exotic species introduction
d) habitat loss and climate change
Ans: c) overharvesting and exotic species introduction
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DNA polymerase catalyzes the synthesis of ____
a. DNA b. histones c. proteins d. ribose e. nucleosomes
What molecule is secreted by an NK cell that has detected an infected or malignant cell?
a. cytokine b. granzyme c. perforin d. MHC I
Which of the following nucleotide sequences represents the complement to the DNA strand
5? ? AGATCCG- 3?? a. 5? ? AGATCCG- 3? b. 3? ? AGATCCG- 5? c. 5? ? CTCGAAT- 3? d. 3? ? CTCGAAT- 5? e. 3? ? TCTAGGC- 5?
A stamen consists of an anther and a filament
____________________ Indicate whether the statement is true or false.