The respiratory system works in conjunction with the system to deliver oxygen to the cells of the body.

The illustration shown is an ovum, a female sex cell. a mutation in this cell may be passed to the woman’s offspring during a) birth. b) mitosis. c) dna replication. d) sexual reproduction

20 the main source of energy for our planet comes from the

This connective tissue consists of large round densely packed cells with the nucleus pushed to one side.