1)Why would sending only a small group of people to settle Mars be considered a bad idea for the future of the population ? 2)Why did it take so long for the Americas to finally be successfully colonized ?

What is the difference between cytokinesis in plant and animal cells? animal cells dived by a cleavage furrow. plant cells divide by a cell plate that eventually becomes the cell wall. cytoplasm and cell membranes are necessary for cytokinesis in both plant and animals.

Ithink you should go back and learn in school rather then here asking questions

They use the si unit, or metric system its all the same thing