Tropical rain forests, grass land and desserts are know for?

Hey me with this one❤☺❤ how do you say that a cell also has a life span and death like an organism? give one example.

Based on the topographic map of mt. st. helens, what is the contour interval of the volcano about height is 2,950 m?

What was the purpose of mendel's experiments with dihybrid crosses? a. to determine if dna was a transforming factor b. to determine if traits could be recessive c. to determine if traits affected each other d. to determine if traits had more than one allele