The diagram below shows stream gradient. How do you calculate stream gradient?
Stream Gradient
Elevation
Difference
Horizontal Distance
w
O A. Elevation difference divided by horizontal distance
O B. Elevation difference times horizontal distance
O C. Horizontal distance divided by elevation difference
D. Horizontal distance minus elevation difference

After fertilization, which type of cellular division is responsible for the growth and development of a complex, multicellular organism?

1. variations in a population of moths allow for some of its members to be able to adapt to environmental changes. the better adapted of the moths will be able to survive the change and thus prevail as the “fittest” of the species. (a) describe three mechanisms in which variation can occur within a species population. (b) explain which mechanism or mechanisms would be responsible for the survival of a population of peppered moths better than white moths in an environment affected by industrial soot. justify your answer.

The pressurized plants and fungi mentioned in the video have some surprising similarities. what differences would you expect them to have?