Hydrogen ions move through the membrane protein shown below.
Based on the diagram, which of these is most likely to cause the membrane
protein to change shape?
A. Passive transport
B. A change in temperature
o
C. Facilitated diffusion
D. A change in pH

Four types of motile cells in human body?

What is thought to have caused the mass extinction at the end of the cretaceous period?

Match each description to the appropriate biome. tropical savanna desert tropical rain forest taiga tundra has sparse vegetation and very cold temperatures located near the equator and contains trees that form dense canopy layers is very hot and dry, and has plants that need little water has cold winters, heavy snowfall and is dominated by conifers has warm temperatures and is dominated by grasses