HELP points and brainiest will be rewarded^^ Which phrase best characterizes diffusion and osmosis?

A. movement of particles from a region of low concentration to a region of high concentration

B. active transport of particles up a concentration gradient

C. passive transport of particles down a concentration gradient

D. movement through a cell membrane using ATP

What’s the student’s scientific question

Veins have a much lower blood pressure than arteries. which of these prevents backflow of blood in veins? a. pressure applied by the heart b. one–way valves in veins c. thin muscular walls of veins

The lake of the ozarks is a human-made lake, so it collects runoff from coal strip-mining, fertilizers, resort wastewaters, and septic drainages. the average lake temperature is between 10∘c and 21∘c. consider the physical requirements for growth and multiplication that would allow fecal coliforms to “blossom” in the lake of the ozarks. which of the following would accurately describe these organisms? check all that apply. psychrophiles facultative halophiles extremophiles mesophiles hyperthermophiles