What do humans need to travel in space that robots do not need?

Hummingbirds drink nectar from flowers, while robins eat plant seeds. what does this reduce?

Which statement about dna replication is true? a. eukaryotes only have one circular chromosome that unwinds at multiple locations. b. eukaryotes can only replicate one segment of a chromosome at a time. c. prokaryotes can only replicate their single circular chromosome in the nucleus. d. prokaryotes only have one origin of replication to initiate replication.

Name the organs of humanelemintary canal.