Which of the following are effects of environmental change on populations? speciation and a decrease in resources loss of habitat and impacts on growth and development a decrease in resources and loss of habitat speciation and extinction

Atypical human cell is approximately 12.00 μm in diameter and enclosed by a membrane that is 5.000 nm thick. (a) what is the volume of the cell including the membrane? (b) what is the volume of the cell membrane? (c) what percent of the total volume does its membrane occupy? to simplify the calculations, model the cell as a sphere. enter your answers using four significant figures.

When analyzing tree rings, what do scientists assume a thin ring indicates?

How do living things obtain phosphorus