___ are ionic compounds that produce positive hydrogen
ions when dissolved in water.

Which worm has eyespots that are used to detect light? a fluke b marine worm c planarian d tapeworm

Why did adult crab numbers decline in he ecosystem, even though sea stars were still available?

The table below shows data for a population of fish in a pond. fish body color # of fins scales? tail shape a silver 4 yes fan b pink 4 yes flat c black 4 yes fan d orange 4 yes flat e orange 4 yes fan f silver 4 yes flat which of the above characteristics would be most in developing a classification system for the fish? a. body color and tail shape b. presence of scales and tail shape c. body color and number of fins d. number of fins and presence of scales