Which of the following is not a reason for the lack of a fossil record from the precambrian time? a. the single-celled organisms that existed during that time did not leave easily identifiable fossils. b. like the rocks of the phanerozoic eon, precambrian rocks contain many visible signs of complex life forms. c. multi-celled organisms evolved in the oceans during the latest years of the precambrian time. d. precambrian rock has been eroded or metamorphosed over billions of years, and very little of it remains at the surface.

Benito is doing research on the effects of florida's elevation on its climate. his notes include the following: 1. the average elevation of florida is 30 m above sea level. 2. the highest point in florida is britton hill, which is 105 m above sea level. 3. the change in temperature from 0 m to 1,000 m is 7 °c. what can benito conclude about the effects of florida's elevation on its climate? a.) florida typically experiences cold temperatures and temperature changes within a narrow range. b.) florida typically experiences cold temperatures and temperature changes within a broad range. c.) florida typically experiences warm temperatures and temperature changes within a narrow range. d.) florida typically experiences warm temperatures and temperature changes within a broad range.

Approximately what portion of the foods that we eat have been genetically modified in some way? a. fewer than 10% b. about 50% c. nearly 100%

What are examples of the plant life and animal life that can be found in each type of terrarium