Rocks containing many dark silicate minerals and plagioclase feldspar have a composition. granitic ultramafic basaltic

Answer is basalt.

Basalt is fine grained igneous rock which contains 45 to 53% silica and 65% rich is feldspar in the form of plagioclase( silicate rock forming mineral). Feldspar is an abundant rock forming mineral. In basaltic rocks the feldspar is silica.

The basalt rocks contains pyroxene group in its minerals which gives it black color. So rocks containing many dark silicate minerals and plagioclase feldspar have basaltic composition.

the answer is: basaltic

Explanation:

post-impressionism is a predominantly french art movement that developed roughly between 1886 and 1905, from the last impressionist exhibition to the birth of fauvism. post-impressionism emerged as a reaction against impressionists' concern for the naturalistic depiction of light and colour.

explanation:

c) 50% there are four chromosomes. after crossing over, 2 of the four have been changed. that means any gamete has a 2 in 4 chance or 50% chance of receiving the mutated chromosome.