What does it mean to be a “carrier” for a trait? what would be the genotype of someone who is a carrier for passing on the trait of not being able to roll the tongue?

Although the two theories differ on the evolutionary path of dinosaurs, they agree that

Ais a landform that is formed at the mouth of a river from the deposition of sediment carried by the river as the water flows.

Blood stem cells may develop into any kind of human blood cells. what kind of stem cells are blood stem cells? a. multipotent stem cells o b. totipotent stem cells o c. pluripotent stem cells o d. unipotent stem cells