What is a fixed allele? a. an allele that formed by adaptive radiation b. an allele that is found on many genes c. an allele that mutates with each generation d. an allele present in all members of a population?

What type of competition exsist between two species. turtles and fish

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

Which direction does the energy flow in this energy pyramid ?