13. B
14.meiosis
15. Heredity
16. 6 chromosomes. One chromosome from each pair ends up in one gamete.
17. DNA must undergo replication.
18. The sex cells end up with only two chromosomes each, half the number found in the parent cell. Each sex cell has one chromosomes from each original pair.
You’re welcome:)
Answer:
c.
Explanation:
The image shown in the question shows that organisms are made up of large number of cells. Living organisms constitute different types of cells.
The atom becomes a negative atom, i believe :)
The water may be polluted and the wetness of the dirt may not be suitible for numerous plants