Why are nonnative species a threat to biodiversity? a) they often use up resources that other organisms need. b) they are not able to successfully breed in the wild. c) they release pollution into many environments. d) they easily contract and spread diseases to other organisms.

Tay-sachs disease is caused by a mutation in the hexa gene located on chromosome 15. tay-sachs follows an autosomal recessive pattern of inheritance. with the of the diagram, identify which of the offspring will be an unaffected carrier. a diagram showing the genes of parents who are carriers of tay-sachs disease a. a, b, and c b. b and c c. a and d d. a e. d