Woolly mammoths are an extinct species of elephant that lived in very cold climates. They had very small ears.
Compared with the large ears of modern elephants, small ears would have assisted in
survival of the mammoths by
A. Decreasing the core body temperature
B. Increasing the effects of heat conduction
C. Increasing the radiation of heat from the body
D. Decreasing the surface area through which heat is lost

The answer is B: Increasing the radiation of heat conduction

the solute can move "downhill," from regions of higher to lower concentration, relying on the specificity of the protein carrier to pass through the membrane. this process is called passive transport or facilitated diffusion, and does not require energy.

rising temperatures because when water vapor in the air is cooled, it condenses. it turns back into a liquid and attaches to dust particles in the air. these very small water droplets group together to form clouds