A nerve fiber contracts on receiving the nerve impulse which is carried from the sarcolemma to every myofibril by the
A Sarcomere
B Sarcoplasmic reticulum
C Calcium ions
D T-tubules​

When elements that form a mineral dissolve in hot water, they form a mixture called a(n) a)geode b)vein c)evaporation d)crystallization e)magma f)lava g)solution h)gem

Monomers are the building blocks of larger molecules, called polymers. for example, proteins are composed of chains of amino acids that are linked together. cellulose is a polymer that makes up plant cell walls. cellulose is made from a chain of c6h10o5 molecules. which monomers are most likely used to produce cellulose? why?

What is the problem in this article? what solution does the article propose?