Which of the following illustrates intraspecific competition?
A) A butterfly feeding on the nectar of a daffodil flower
B) A sea gull swooping down to snatch a fish from the water's surface
C) A tick and a flea sharing a dog's back
D) Male red-winged blackbirds defending limited nesting sites from other males
D
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Which nation in East Asia is poised to become a major geopolitical and economic force in the 21st century?
A) North Korea B) South Korea C) Taiwan D) Japan E) China
A standard rain gauge consists of a funnel-shaped collector attached to a long measuring tube. The cross-sectional area of the collector is ____ times that of the tube. Hence, rain falling into the collector is amplified ____ in the tube, permitting measurements of great precision.?
a. ?2; twofold b. ?4; fourfold c. ?6; sixfold d. ?8; eightfold e. ?10; tenfold
The availability of, or lack of, private and public pension funds can influence the decision of some couples on how many children to have
Indicate whether the statement is true or false
What can changes in the composition of volcanic gases indicate?
A. Magma rising toward the surface B. Whether or not volcanic mudflows can occur C. Where valuable mineral resources are located D. How much lava will be produced