.:Answer:Many bears hibernate in caves during winter
Explanation:
<em>Membrane proteins that aid in the passive transport of substances do so without the use of ATP. During active transport, ATP is required to move a substance across a membrane, often with the help of protein carriers, and usually against its concentration gradient.</em>
Abiotic factors are the nonliving aspects and water parts of and ecosystem
Answer:
Stratus clouds usually produce no precipitation
