Which of the following best describes threadlike structures that connect to the centromere and move chromosomes? A:Cytokinesis
B:Sister chromatid
C:Spindle fiber
D:Centromere

How do tides affect the organisms living in intertidal zones? a. no organisms live in intertidal zones due to the tumultuous environment. b. the mechanical forces of the waves keeps the organisms clean. c. only plants live in intertidal zones because the animals float away with the waves and never return. d. the mechanical forces of the waves can dislodge the organisms from their habitat.

What are the two main phases of a cell cycle

Sequence how oxygen accumulated in the atmosphere and the effect it had on life by completing the flowchart