What are mutations?

a. changes in nucleotides of a dna molecule that affect the genetic message.
b. repairs of damage to dna molecules by specialized enzymes.
c. removal of damaged dna nucleotides by enzyme molecules.
d. reduction in the rate of replication of dna due to regulatory mechanisms.

In addition to seeds, which of the following characteristics are unique to the seed-producing plants? a) sporopollenin b) lignin present in cell walls c) pollen d) use of air currents as a dispersal agent e) megaphylls

Which type of neuroglia is found outside of the brain?

{answer found. it's (3 ) }which statement describes the cell cycle? (1)the cell cycle is a process in which one cell divides into four genetically different cells. (2)the cell cycle is a process in which one cell divides into two genetically different cells. (3)the cell cycle is a process in which one cell divides into two genetically identical cells. (4)the cell cycle is a process in which one cell divides into four genetically identical cells.