Fill in the blank. the of animals is based on scientists' current understanding of the evolutionary history of living species. although they are radially symmetrical, echinoderms are more closely related to a human than to a jellyfish because they are

When analyzing tree rings, what do scientists assume a thin ring indicates?

How can an organ, such as the lungs, work for multiple body systems?

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!