2 1.2.3 Quiz: The Distance Formula Question 9 of 10
Which expression gives the distance between the points (5, 1) and (9,-6)?
O A. (5-9)2 + (1 - 6)?
O B. (5 – 9)2 + (1 +5)?
C. (5-9)2 + (1 +5)
D. 115-9;? +(1-5)
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Asnail, elodea (aquatic plant), or both were added to the tubes and they were stoppered. tubes were placed under a grow light for 24 hours and the results recorded. the test tubes were then covered for 24 hours to produce a dark environment and the results recorded. which statement best explains the change in test tube d from the light setup to the dark setup.

According to the theory of punctuated equilibrium, at what rate does speciation occur? species change depending on the rate of natural selection. after periods of stasis, new species evolve relatively rapidly. species change slowly and eventually form new species. some species change quickly and others change slowly to balance the overall rate.

Which kind of aquatic ecosystem does the photograph most likely show? a. marsh b. swamp c. lake d. river