Fish, reptiles, amphibians, reptiles and mammals
Systematics is the study of the units of biodiversity. Systematics differs from ecology in that the latter is concerned with the interactions of individuals (and therefore species) in a particular time.
Answer:
rock that forms when melted rock (magma, lava) cools and hardens
Explanation:
Igneous rock, or magmatic rock, is one of the three main rock types, the others being sedimentary and metamorphic. Igneous rock is formed through the cooling and solidification of magma or lava. The magma can be derived from partial melts of existing rocks in either a planet's mantle or crust.
Brainliest plz
A statement that would be least likely used too describe variation is
“Variation is something that moves”
That is a least likely description.
