How are igneous rocks formed? Particles in water become sediment and harden into rocks.

Igneous rocks are formed from molten magma inside the Earth that cool.

Particles of sand and mud form layers that harden into rock.

Chemical reactions form new types of rocky minerals.

The embryos of a bird, a reptile, and a mammal are similar in appearance. how does comparing the physical appearance of embryos of different species support the theory of evolution? a. it shows that these organisms share a common ancestor. b. it provides evidence that these organisms eat the same foods.c. it shows that these organisms share the same habitat.d. it provides evidence that these organisms suffered a genetic mutation.