Answer: b. Muscles
A metazoa is a division of animal kingdom that includes all animals expect protozoa and sponges. Metazoa division includes multicelluar animals, which exhibit highly differentiated cells. They have muscular and nerve system and well coordinated tissues and organs. Locomotion requires a coordination activity of muscular, skeletal and neural system. It is mainly achieved by contraction and relaxation of muscles that occurs due to specialized muscle proteins named as actin and myosin which receives signals from nerves.
Hence, locomotion in metazoa is due to contraction of muscles.
Answer:
Humans have some stem cells, but those cells are not easily available to help with healing. Most other mammals are the same, so they aren't good at regeneration either. Amphibians and some fish have stem cells that are more easily available, and are usually pretty good at regeneration.
The term is ADVERSE DRUG REACTION. Adverse drug reaction refers to an injury that occur as a result of taking a particular medication. It may result from a long time use of a drug or from a single dose. Adverse drug reaction is always negative and may be very dangerous to the well being of the user
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:
Yes on both parts
Explanation:
Microscopic creatures including bacteria, fungi and viruses can make you ill. And they are alive
