Methane hydrates in the ocean are a significant source of methane true or false

True

Reason -

Methane hydrates are also known as hydromethane, methane clathrate etc. and it has a cage like structure where methane is entrapped in the crystal structure of water. Its deposits are found at the ocean floor . Methane hydrates are usually stable at low oceanic temperature but as the water of ocean gets warmer, the crystal structure of hydrate breaks there by releasing methane in the ocean.  

i would go with b

cytokinesis occurs after telophase so that eliminates d

and the entire reason for cytokinesis is for cellular reproduction