In Africa, whistling thorn trees, also known as Acacia trees, often provide a home and food for different specialized ants. The ants feed on the rich nectar that is at the bottom of the leaves. When large herbivores - such as giraffes, antelopes, or elephants – begin to feed on the trees, the ants aggressively swarm out and bite. Which explanation below BEST describes this relationship

When the cell concentrates potassium within, against the natural tendency of matter, it is performing a.passive diffusion b.facilitated diffusion c.active transport d.pinocytosis

Been sitting here trying to take this test and don't know this answer! place the events of a feedback mechanism associated with body temperature in the correct order. ·nerve cells send message from skin to the brain ·body returned to normal temperature around 98.6 degrees f ·temperatures regulation center in the brain sends out signals ·body temperature exceeds 98.6 degrees f ·sweat glands throughout the body activate to cool off skin surface it is a 1 through 5 question in biology!

An uncomfortable feeling in the ears when descending in an airplane is caused by changes in air pressure on the: a. inner ear b. middle ear c. eardrum d. hammer/anvil