Which is the neurotransmitter that causes the release of calcium ions and initiates the steps of skeletal muscle fiber contraction?.

This graph represents four ecosystems. each ecosystem has a different number of species, adding to its biodiversity. different colors represent different species. which statements correctly summarize the data depicted by the graph? 1. ecosystem d has more biodiversity than ecosystem c. 2. ecosystem b has more biodiversity than all the other ecosystems. 3. ecosystem a has more biodiversity than ecosystem b but less biodiversity than ecosystem c. 4. ecosystem b has more biodiversity than ecosystems c and d but less biodiversity than ecosystem a. 5. ecosystem a has more biodiversity than ecosystem c but less biodiversity than ecosystem b.

Prompt what is your personal ideology? give your opinion on the three following topics. justify your support or opposition to each issue by using examples. issue one: should the government have the right to place a high tax on soda to discourage its consumption and fight teen obesity? issue two: should the government be allowed to monitor your actions on the internet to keep the nation safe from terrorism? issue three: should the government be allowed to outlaw texting while driving to keep drivers safer on the road?

Afish fossil is found in a rock. a foot bone and tooth are found in an older layer of the same rock. what can scientists learn from the rock? a) the area changed from land to water. b) the area changed from water to land. c) the area has always been land. d) the area was once an ocean.