Which of the following fossil discoveries best demonstrates a change in the earth's climate? a. scientists find a large amount of fossils of tropical plants and animals in a desert. b. scientists discover fossils of straight teeth buried below fossils of curved teeth. c. scientists discover a large amount of fossils of marine life near the shore. d. scientists find an area that contains a variety of plant fossils but no animal fossils.

Diagram of the evolution of land plants?

What do your cells need to live? a. carbon dioxide b. carbon c. air d. oxygen

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!