What do the rod-like green structures within the Euglena allow the organism to do? move from one place to another use sunlight to make food exist in a colony use its cilia to fight other organisms

What happens when a magniseum ion ia atracked to a chlrene ion

Some birds look for food near cattle and other livestock. the movement of the cattle churns up the ground, making insects available to the birds. the cattle appear to be unaffected by the presence of the birds. what kind of relationship exists between the birds and the cattle? o a. parasitism o b. commensalism o c. predation o d. mutualism

How can antibodies "remember" a particular bacterial invader or "antigen" on that invader?