WHAT IS TRUE ABOUT CELL PARTICLES PLEAS HEL Particles move against the concentration gradient through the help of a carrier protein.

Particles move only when directed by the cell’s nucleus.

Particles move across the membrane if energy is available.

Particles move from an area of high concentration to low concentration.

Which system revise and send electrical signals throughout the body

Identify the terms using the following picture. principle of dominance item 1 can be described as the . item 2 can be described as the . the "p" represents from one parent.

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