Which of the following is the supportive element of hydrostatic skeletons?
A. a mineral matrix
B. a hard outer covering
C. a fluid-filled body cavity
D. contractile proteins
C
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Primarily due to habitat destruction, pollution, human disruption, fragmentation.
A. hotspot B. habitat loss C. edge effects D. megafaunal extinction E. extinction vortex
Sidearms are attached to ________.
A) B tubules B) A tubules C) central pairs D) radial spokes E) interdoublet nexin
Which of the following ideas was most commonly held in the eighteenth century?
A. the fixity of species B. genetic change through mutation C. changes in a species through adaptation to the environment D. evolution by natural selection over time
During specialized transduction carried out by lambda phage in Escherichia coli, differences in the phage and host attachment (att) sites mediate insertion of phage DNA into host DNA.
Answer the following statement true (T) or false (F)