Which two structures engage to create a muscle contraction?.

Which best describes an adaptation that could be found in a fish that lives in a slow-flowing stream? the ability to attract prey by glowingextra gills, for oxygen extractionthe ability to grow largerextra fat, for warmth

Which factor affects the force of gravity between objects? check all that apply. direction distance mass shape time

Rna primer constructed during dna replication needs to be replaced because rna differs from dna. it contains ( adenine, cytosine, uracil ) instead of ( adenine, guanine, thymine ).