GRE课程
Questions 1 and 2 are based on this passage
When selecting a nest, the female of the river blenny (a small fish) appears to be sensitive to both size and orientation. Blennies deposit their eggs preferably in nests under large stones and in nests facing southeast. Southeast-facing nests contain larger egg clutches, a fact that cannot be completely explained by differences in nest stone sizes. Moreover, in a recent study, current speeds upstream of the nest and at the nest entrance were similar for nests facing southeast and those facing in other directions. A southeast-facing entrance per se thus seems to be the specific nest feature preferred by females, rather than the effect of selective positioning on current at nest entrance. The reasons for this preference are unclear, however.
The passage is concerned with which of the following
determining the different ways in which current speeds can influence the nesting preferences of female river blennies
establishing nest orientation as a determining factor in egg laying among female river blennies
questioning the importance of nest size as an influence on egg laying among female river blennies
comparing the features of female river blennies that face southeast with those of nests facing in other directions
examining how female river blennies determine the relative importance of nest size versus nest orientation
Select one answer choice.
