Instead of swimming alone, many types of fish swim together in groups, or schools. when grouped together, the fish may appear to be one large organism rather than many small organisms. this appearance to protect the fish from possible predators.

this relationship between fish is an example of

Based on the data in your tables, did the light-colored moths have a higher or lower survival rate after the industrial revolution?

What were the main components of earth’s earliest atmosphere? oxygen and ammonia hydrogen and helium oxygen and nitrogen hydrogen and nitrogen

Hydrilla (hydrilla verticillata) is an invasive aquatic plant and one of the most serious aquatic pests in florida. hydrilla has already been introduced to hundreds of bodies of water throughout florida, hydrilla is difficult to control because it grows rapidly and survives in many different water depths and conditions. hydrilla • describe how hydrilla affects native plant and animal species. include both a biotic and an abiotic limiting factor. • suggest one biotic and one abiotic recommendation that could slow the spread of hydrilla