Ascientist researching salamanders has obtained two different specimens. under what conditions would he classify them as belonging to different species

Aboy with an extra x chromosome probably has which of the following syndromes?

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

The (blank) states that all loving things are made of cells.