Which statement describes a major reproductive difference between plants and animals? a) plants can reproduce every year; animals cannot. b) plants reproduce asexually; animals reproduce sexually. c) all animals carry their young internally; plants do not. d) plants can have both male and female structures in the same organism; animals d

15. which of the following is not human-caused groundwater pollution? a. water in an aquifer dissolves elements such as arsenic and mercury from surrounding rock. b. water in an aquifer is contaminated by leachate that seeps into the ground from a landfill. c. water in an aquifer becomes polluted with chemicals used in hydraulic fracturing, or fracking. d. water in an aquifer absorbs harmful bacteria from the drainage field of a septic tank.