What types (list more than one thing) of items can be recycled?

Which member of the following food chain will be least affected by ddt, a pesticide water pollutant, if bio-magnification is occurring? algae> zooplankton> crayfish> leopard frog> large mouth bass

The cretaceous period spanned the time interval between and 65 million years ago. 250 million 144 million 75 million 200 million

Under which of the following circumstances would natural selection not operate on an organism