Ethan began making a model to show the processes which resulted in the formation of oceans. Art shows three boxes connected with arrows. The label on the first box is 'Sea floor spreading', second box is 'Earth's plates meet',and the third box is labeled with a question mark.

Which of the following would be the next step in the process?

Crust is broken down
Earth’s crust moves
Earth’s plates meet
Sea floor spreading

Name the plastid and pigment likely to be found in the cells of (a) petals of sunflower (b) ripe tomato.

The endoplasmic reticulum (er) is an organelle in some cells. in these cells, it is continuous with the nuclear membrane and forms a large part of the cell\'s total membrane. sort the phrases below as describing rough er, smooth er, both, or neither. note: if you answer any part of this question incorrectly, a single red x will appear indicating that one or more of the phrases are sorted incorrectly.1) found in prokaryites and uekaryotys2) involved in protein synthesis3) involve in lipid synthesis4) contains molecular chaperones in lumen5) bound with ribosomes6) involved in toxin or drug metabolism7) large systemot internnected tubules,vesicles, and sacs8) "packages" enzymes in vesicles for secretion.

Is there any solid scientific evidence that humans have been cloned?