What has a huge impact on the climate on land?

What must happen before a body cell can begin mitotic cell division

Which of the following contributes to the structural rigidity of cellulose? adjacent glucose polymers are stabilized by hydrogen bonding. glucose residues are joined by (α1→4) linkages. cellulose is a highly branched molecule. the conformation of the glucose polymer is a coiled structure.

What is the compound name for the formula [ru(en)2cl2]2+ and [co(en)cl2br]-