A different parent-daughter pair in the felsic ash has a half-life of 50 million years. There is 25% of this parent still remaining. How old is the felsic ash?

Which statement is true about the cell theory? a) it is well-supported by evidence. b) it is unchangeable and permanent.

Plz ! having a smooth seeds is the dominant trait. having wrinkled seeds is a recessive trait. the offspring of two plants with smooth seeds, a. must have smooth seeds. b. may have smooth or wrinkled seeds. c. must have wrinkled seeds. d. have a 25% change of having smooth seeds.

Agenus is a taxonomic grouping that identifies a collection of species. when a scientist discovers a new species, how is this species assigned to a genus