HEL
PLEAS
What is a possible cause for a decrease in ecosystem productivity?
a. an increase in the biodiversity of the ecosystem
b. a decrease of the biodiversity of an ecosystem
c. the biodiversity of an ecosystem experiencing no change
d. an ecosystem becoming more stable

Nasa scientists must work together to make sure that everything is correct and accounted for when launching a shuttle. besides a physicist, what other type of scientist would be in making sure that the shuttle has the appropriate type and amount of fuel to reach its destination?

Modern whales developed their traits through natural selection what occurs during the process of natural selection

Which number represents a basic ph, 4 or 9? numerical answers expected! answer for blank 1: i'll give