Bacteria is the precursor to various organisms which appeared on earth. which of these statements is correct about bacteria? select one: a. algae evolved to give rise to bacteria. b. fern-like plants evolved to give rise to bacteria. c. single celled-organisms evolved chemically to give rise to bacteria. d. reproducing molecules evolved chemically to give rise to bacteria.

Drag each label to the correct location on the image. each label can be used more than once. a scientist introduced mutations in a gene sequence isolated from bacteria. study the sequence, and identify the steps where the mutations may affect the formation of proteins. in the sequence, black letters stand for protein coding regions and red letters stand for noncoding regions. protein will not be changed. protein may be changed. attcgtgttc atcgtgttc atcgtattc attcgtattc

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.

The buildup of sediments where a river empties into a slow-moving or nonmoving body of water is known as a/an