Is unicellular eukaryotic or prokaryotic

Why is it important to reduce the number of chromosomes in half when forming gametes for sexual reproduction?

Land conservation is a worldwide priority. there are several methods to prevent the loss of land due to a variety of reasons. which method is not a way to conserve land? a) sea walls b) rainwater harvesting c) limits on clear cuts of forests d) cut and burn methods of clearing land

Which of the following do all living things have in common