Which of the following best describes two identical copies of chromosomes made during S phase? A:Cytokinesis
B:Sister chromatid
C:Spindle fiber
D:Centromere

How do diseases caused by bacteria and diseases caused by viruses react to antibiotics?

Crossing over and independent assortment are important activities that occur during meiosis. what is the significance of these activities

Which description shows competition in an environment? an organism that feeds on some food an organism that finds a place to sleep three organisms of the same species living in an area three organisms battling over limited resources