Viruses can be transmitted through air, water food, insect bites, and direct skin contact. Once a virus gains entry to the body, it invades a host cell in order to -

Many organs are involved in the processes of keeping the blood and the body clean. when poisonous or harmful substances are in the blood, they are absorbed by the and released in a less harmful form. when wastes are present in the blood, they are filtered out and removed from the body by the

How would you describe the the organisms in the second row of model 1 that are connected to the parents by a line

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