It’s true (a) because bones become brittle and easier to break if theyre not used. bones more frequently used become stronger.
Answer:
1) selective permeability of the cell membrane refers to It's ability to differentiate between different types of molecules, only allowing some molecules through while blocking others. Some of this selective property stems from the intrinsic diffusion rates for different molecules across a membrane.
Answer:
When a muscle contracts, the actin is pulled along myosin toward the center of the sarcomere until the actin and myosin filaments are completely overlapped.
Explanation:
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Answer:
a polymer is a large unit comprised of monomer
