The structure that hotds two chromosomes together until they separate for cett divisionois 1.chromatid .

2.cytoplasm .

3.chromatin .

4.centromere

Which of the following does not describe a physical property of iron? a iron is silvery-white or gray in color. b iron has a boiling point of about 3,000°c. c iron is a magnetic element . d iron and sulfur react to form iron sulfide.

What must be done to breed dogs for a partical trait

A60-tooth gear is connected to a 72-tooth gear. if the smaller gear turns 12 times, how many turns does the larger gear make?