What type of behavior is described as anadromous?
a. Homing behavior to hatch
b. Echolocation to find prey
c. Stereo smell to find prey
d. Schooling as defense
e. Migration to freshwater to spawn
e
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Worldwide, just a handful of farm types exist
Indicate whether the statement is true or false
Seawalls are constructed perpendicular to the shore to prevent wave erosion.
Answer the following statement true (T) or false (F)
Four companies, Alpha, Beta, Gamma and Delta, are burning coal to produce electricity. As a result, they also produce emissions. The first row of the table below shows the total pounds of emissions currently produced by each firm. The other rows of the table show the cost for each firm of reducing emissions by the first 50 tons, the second 50 tons, and so on. The government wants to reduce emissions by one third, and does so by issuing marketable permits based on the current level of emissions where the permits will shrink the allowable amount of pollution by one third. Alpha will reduce emissions by ____ tons, Beta will reduce emissions by ____ tons, Gamma will reduce emissions by ____ tons, Delta will reduce emissions by ____ tons, for a total cost of ____.
A. 50, 150, 50, 250, $130 B. 50, 200, 0, 250, $150 C. 0, 200, 50, 250, $120 D. 50, 200, 50, 200, $100
What do these channels indicate about past events on Mars?
A. There were explosive volcanic eruptions. B. Strong winds eroded into a series of volcanic layers. C. Glaciers once covered the entire planet. D. The surface once had running water that eroded and deposited sediment.