When an individual muscle fiber receives a threshold stimulus, it contracts as much as possible. ... a threshold stimulus is the minimum amount of energy needed to make a muscle fiber contract.
The X symbol looks too much like the multiplication symbol, it also makes using it as a variable more confusing.
The answer is; C
Fossil fuels are the remains of an organism that lived in the past and have been preserved or their impression has been preserved. Fossils are studied to identify the difference (genetic and phenotypic) between past and future related organism and are carbon dated to determine the time in which the organisms existed. The study of fossils is called paleontology.
(A)Until the onset of PUBERTY,
<span>The major benefits to replacing fossil fuels with solar panels and wind turbines to meet our energy needs would be </span><span>Wind and solar power are renewable resources and do not contribute to climate change.
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Renewable resource is much better for long term result because it wouldn't damage the environment and we can utilize it indefinitely. </span>
