List the function of nucleus? name the cell part that has tiny holes?

Which of the following occurs after a natural or unnatural disturbance in an ecosystem

Whay is the following best defines climate

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