If a person’s phenotype is that they cannot roll their tongue, what is their only possible genotype?

Uhh I'm really not sure if not rolling the tongue is dominant or recessive, but judging by the fact that you said their "only possible" genotype, I'm assuming it's homozygous recessive

protein synthesis is an example of feedback mechanism which in homeostasis

hello there,

igneous rock formed from below the surface would have more crystals because

answer: because magma cools more slowly than lava