In pea plants, purple flowers (p) are dominant over white flowers (p). if two heterozygous purple-flowered plants are crossed with each other, then what are the possible genotypes of the offspring?
a) pp only
b) pp and pp
eliminate
c) pp and pp
d) pp, pp and pp

Radiometric dating is used to tell the absolute age of materials by studying the decay rate of radioactive isotopes. the decay rates of isotopes are constant and are expressed as .

Which of the following types of stars is most likely to end up as a supernova? in graph a, the curve peaks at 800 nm, in the red section of the visible light spectrum. in graph b, the curve peaks at 550 nm, in the green section of the visible light spectrum. in graph c, the curve peaks at 450 nm, in the blue section of the visible light spectrum. in graph d, the curve peaks at 300 nm, in the violet section of the visible light spectrum. a b c d

When the oxygen produced by photosynthetic plants in the water dissolves in the water, which of these is being formed?