Placing shielding around a radioactive source helps protect from harm. A Geiger counter is used to determine how much radiation is still passing through the shielding. Determine from the information given the Geiger counter reading for a gamma source with 4 sheets of lead shielding.

How are the tortoises that darwin observed on the galápagos islands similar to the anoles that losos studied

Autotrophs a. consume their food to get energy b. may use photosynthesis to gain energy c. are also called consumers d. cannot use solar energy

The fish shown above is a tarpon. it is a fast-swimming and powerful open-water fish. its closest relatives, oddly, are burrow-dwelling conger eels that stay on the bottom. both eels and tarpon developed from snake-like larvae that float in the plankton during the first stages of life. once they mature, tarpon and eels are not found near one another in the ocean. the tarpon and the eel illustrate all of the following except