Answer: The correct answer is A) The muscle contracts.
During muscle contraction, the thin filaments ( actin filaments) slide pass over the thick filaments ( myosin) and the sarcomere ( unit of muscle contraction ) becomes short. This is explained through sliding filament theory.
Supply of energy in the form of ATP is very important for the contraction of muscle.
The role of ATP is to prepare myosin for its binding with actin by moving it to a state that has higher- energy. The thin filaments slide over the thick filaments and the contraction of muscle takes place.
I think that the number of spiders in the house will decrease because spiders like cooler air and they usually come in houses in the spring because it is hot out.
The ideal temperature for Radish seed germination is between 18°C and 29°C. Air and soil temperature ranges affect Radish seed germination. Air temperatures of about 10 to 18°C will give the best results
