A 5-kg fish swims at 1 m/s into an absent-minded 1-kg fish at rest. After lunch the speed of the larger fish is
A. 2/5 m/s.
B. 6/5 m/s.
C. 5/6 m/s.
D. 1/2 m/s.
Answer: C
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Of the following, which is the best scientific hypothesis for the question, "How do bees help pollinate flowers?"
A) Bees are attracted to flowers by both color and smell. B) Bees help transfer pollen as they visit flowers to eat the pollen and drink the nectar. C) Bees can see light-colored flowers better than dark-colored flowers. D) We should help bees survive by planting more flowers that provide nectar and pollen.
High population density can ________
A) hinder organisms from finding mates B) increase the incidence of disease transmission C) decrease biodiversity within a species D) decrease the use of resources E) decrease competition
Demand to use congested roads has been reduced in a number of ways including
A) reduced car sales. B) prohibition of SUVs in congested areas. C) congestion charges and tolls. D) higher taxes for multi-car families. E) forced distancing parking for cars with low mileage efficiency.
According to the concept of ________, lighter less dense continental crust "floats" higher on the mantle than denser oceanic crust.
A. geosynclines B. gravitational collapse C. delamination D. isostasy E. block faulting