Which statement is the first step of protein synthesis? A. DNA unzips between the base pairs

B. A new DNA strand is made

C. tRNA carries amino acids to the ribosome and attaches it to the mRNA strand

D. A ribosome attaches to the mRNA

Why do you think water is so important to living things

After reading the paragraph below, answer the questions that follow. researchers have created a robot that has a very thin leg that is moved by cardiac (heart) cells contracting in unison. the robot, made of a polymer similar to that used in making contact lenses, is bathed in heart cells with supporting cells, which then attach to the robot and provide movement as they contract. all of the cardiac cells working together can cause the robot leg to move in a way that individual cells could not. this is an example of a. emergent properties of cells. b. energy flow through an ecosystem. c. adaptation. d. internal environment regulation.

Use the drop down menus to match each example to the fossil topic discussed then to show how the fossil record gives evidence of evolution