Ecosystems rely on interdependence between species to keep balance. Which of the following is a threat to a stable ecosystem?
A. Loss of biodiversity
B. High biodiversity
C. Low biodiversity
D. Increase in biodiversity

What are the two main phases of a cell cycle

What’s a example of extrusive rock that cooled to quickly for grains to form

You have trained year for a marathon. in your first attempt to run a marathon, you decide that you want to complete this 26-mile race in 4-5 hours. a. what is the length of a marathon in kilometers (1mile= 1.6 kilometers). b. what would your average speed have to be to complete the race 4.5 hours? give your answer in kilometers per hour.