Why do many RNA viruses commonly demostrate antigen drift?​

Red flowered snapdragons are crossed with white flowered snapdragons, producing all pink snapdragons in the f1 generation. what would you expect if you crossed pink with pink? 3/4, 1/4, 1/2 red, 3/4,/1/2,/1/4 pink,1/2, 3/4, 1/4 white

Explain why the plants cortex would serve as the best food source for animals

Which of the following is the earliest era of earth's geologic time scale? cenozoic mesozoic precambrian paleozoic