Which of the terms best describe the number of different species in the biosphere or in a particular place?
a. biodiversity
b. ecosystem diversity
c. genetic diversity
d. species diversity

The “ecological footprint” left by a citizen of a developed nation is about four times larger than that left by a citizen of a developing nation. why is this the case?

Describe your dna model. which part do the straws represent? the pushpins? the paper clips and the black dots you made with the marker?

The model illustrates a process by which a substance is taken up by a cell. which statements describe the process? a. the model shows the process of endocytosis. b. the process shown in the model requires energy from the cell. c. the cell membrane in the model remains intact throughout the process. d. the model shows the process of facilitated diffusion.