What is the velocity if there are 25 waves that pass by a given point in 10 seconds and the wavelength is 50 cm? A. 125 cm per second
B. 2.5 cm per second
C. 12.5 cm per second
D. 15 cm per second

In what for do plants utilize nitrogen? why do they need nitrogen?

Which of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above

Agenetically engineered corn plant is approved for agricultural use. the plant produces pollen that can make its own toxins. these toxins protect the corn plant against pests and no longer require the application of chemical pesticide. what is a likely impact on the farmer of growing such a variety of corn? a- the financial costs for the farmer would be lowered since less crops would be lost to pests. b-the financial costs for the farmer would be lowered since more crops would be lost to pests. c-the farmer may be held responsible for increasing chemical pollution. d-the farmer's expenses for pest control would increase due to an increase in bee population.