Which of the following processes occurs during meiosis and not mitosis 1. crossing-over 2. cytogenesis 3. crossing-under 4. cytokinesis . i said (1) as crossing-over does not occur in mitosis. you guys agree?

Yes, crossing over does not occur during mitosis. As mitosis is simply the duplication of cells, there is no gene variation that comes from crossing-over.

It depends on the surface of the levels. the rougher the surface, the greater is the frictional force. for rougher surfaces, you would need to exert greater force to move the object. the concept is that, you must overcome the frictional force in order to bring the object into motion. this is the reason why we add lubricants to the joints so they could easily move. this answer was on