Why are protists not considered bacteria?

What is the next step in muscle contraction after the actin changes shape? (apex)

Apaleontologist finds a plant fossil that shows that the plant had seeds. what can the paleontologist conclude?

Which set of characteristics best describes sedimentary rock? a) largest type of rock, made of organic matter, hardest type of rock b) often contains layers, forms near sources of water, contains fossils c) least abundant type of rock, made of other rocks, made mostly of minerals d) most abundant type in earth's crust, made of magma/lava, contains no fossils