What happens to the chromosomes when they change from chromatin to chromatids?

chromatin 30 nm in width condenses to form super solenoid chromatin and then chromatid is formed which is of 700 NM in width.

thanks! ;)

ecological efficiency: % of usable energy transferred as

biomass from one trophic level to the next typical is 10% efficient (90% of

energy is lost),is diagramed as the pyramid of energy flow. then osprey eagle

are tertiary consumer and the shrimp are primary consumer, so to balance

mass of shrimp (1/0.1) / 0.1 = 100 kg 

the correct answer is b