Are very simple plants that do not have true roots, stems, or leaves and can grow to only a few centimeters tall. a. vascular plants b. flowering plants c. cone-bearing plants d. nonvascular plants

Which set of characteristics best describes igneous rock? a) largest type of rock, made of organic matter, hardest type of rock b) least abundant type of rock, made of other rocks, made mostly of minerals c) found on all continents, contains wavy bands of stripes, contains fossils d) most abundant type in earth's crust, made of magma/lava, contains no fossils