Columns on the periodic table are called

a. sections

b. periods

c. groups

d. rows

If you have a difficult time knowing where your hand is without looking at it you may be having a problem with your what ?

Which of the following is not a possible effectof increasimg carbon dioxide levels in the atmosphere ?

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!