Which statement about animal nervous systems is true? Group of answer choices All taxonomic groups of animals have nervous systems, except annelids. All taxonomic groups of animals have nervous systems, except sponges and jellyfish All taxonomic groups of animals have nervous systems, except jellyfish. All taxonomic groups of animals have nervous systems, except sponges

Refer to the family pedigree shown here. in generation i, one parent is affected by the gene mutation and one parent isn't. in generation ii, all three children are affected by the gene mutation. what can you conclude about this gene mutation? a. all children born in future generations will be affected by this disorder. b. this gene mutation is a dominant disorder. c. this gene mutation is a recessive disorder. d. the generation i mother is a carrier of this gene mutation.