What is the function of kinetochore microtubules in the mitotic spindle? O A. They keep sister chromatids in pairs
B. They define the furrow during cytokinesis
C. They break down the nuclear envelope
D. They attach to chromatids and pull them towards the poles of the cell

Which of the following statements about c4 carbon fixation is not true? a c4 carbon fixation is an adaptation for plants exposed to high light intensityb. c4 carbon fixation occurs in more plants than c3 carbon fixation. c c4 carbon fixation is more common in areas of high temperatures than c3 carbon fixation. d. c4 carbon fixation occurs in the inner cells of a leaf rather than the entire leaf.

Mutations associated with albinism affect proteins involved in synthesis

Blood stem cells may develop into any kind of human blood cells. what kind of stem cells are blood stem cells? a. multipotent stem cells o b. totipotent stem cells o c. pluripotent stem cells o d. unipotent stem cells