it needs 40 feet for the carpet.
hope this helps
the answer is chloroplast
Semipermeable means something can be penetrated by a few things. that being said choices A and B can be eliminated.
Choice D would negate semi as it says all polar molecules, leaving choice C as the best answer
A cave, from the water slowly cracking and chipping away at the rock it seeps down into, creating freshwater, but also, slowly creating a cave.
DNA probably. It might be one of the latter rungs too, thymine, and 2 others I forgot
