Are genetic mutations always harmful?

What organelle other than the nucleus houses dna in a eukaryotic cell?

Which of the following types of stars are dim but can have high surface temperatures? giants main sequence stars supergiants dwarfs

Which are characteristics of flukes? check all that apply. a they are free living. b they are a type of flatworm. c they reproduce sexually. d they have eyespots. e they are segmented.