22. What is the role of cyclins in a cell? A. To control the movement of microtubules B. To signal for the cell to divide
C. To stimulate the breakdown of the nuclear membrane
D. To cause the nucleolus to disappear

Which of these is a major trend in land plant evolution? a) the trend toward smaller size b) the trend toward a gametophyte-dominated life cycle c) the trend toward a sporophyte-dominated life cycle d) the trend toward larger gametophytes

Up until 1938, paleontologists accepted the idea that coelacanths (an ancient fish) went extinct at the time that they last appear in the fossil record, about 80 million years ago. but in 1938, a live coelacanth was discovered off the coast of south africa that was compared to the fossil record and found to be the same species what goal of science does this discovery represent

In the water cycle , when does water undergo a chemical change