I'm pretty sure it's <span>coal, nuclear, & oil, because they are man-made, and they're only good for a one-time use only.</span>
Answer: Rainforests have an abundance of plants and animals for the following reasons: Climate: because rainforests are located in tropical regions, they receive a lot of sunlight. ... Canopy: the canopy structure of the rainforest provides an abundance of places for plants to grow and animals to live.
Explanation:
Answer:
When calcium concentration increases during depolarization, it shifts the conformation of troponin and tropomyosin, and actin is able to associate with myosin. As calcium is taken up again by the sarcoplasmic reticulum the muscle cell relaxes.