the lowest region of the atmosphere, extending from the earth's surface to a height of about 3.7–6.2 miles (6–10 km), which is the lower boundary of the stratosphere.
Matter flows easily but is difficult to compress.
the answer is A. I took the test and got it right. The question is specifically asking about the THIN filaments, making it actin- and only actin.
Answer:suga and carb with the = x= co2-6%5 is the equivalecy of acid
Explanation: