Which of the following creates double-stranded breaks to initiate recombination in eukaryotes?
A. Spo11
B. RuvAB
C. Rad50
D. Sgs1
E. Dmc1
A
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Of the following four islands at the same latitude, which one likely possesses the fewest species?
a. 1,000 square kilometers in area and 300 km from the mainland b. 3,000 square kilometers in area and 100 km from the mainland c. 100 square kilometers in area and 3,000 km from the mainland d. 300 square kilometers in area and 1,000 km from the mainland e. All islands are at the same latitude, so they are all likely to have the same species richness.
Picrophilus has a pH optimum below 1 and can even grow at or near pH 0.
Answer the following statement true (T) or false (F)
Which of the following is currently the leading cause of extinction?
a) overexploitation b) introduced species c) habitat loss d) pollution e) disease
The coastal wetlands are losing soil at an alarming rate. In Louisiana, it is estimated that 24 mi2 of wetlands are lost each year, which equates to one football field every 38 minutes. Why is the loss of these wetlands so critical?
What will be an ideal response?