Given the age of the meteorite is 4.5 billion years old with 78 atoms of lead-206 the answer should be B. 156. The half-life of uranium-238 in order to decay into lead-206 is 4.46 billion years, which means that the original number of atoms is 156.
1.
Paramecium
2.
Amoeba
3.
Paramecium
4.
Euglena
5.
Volvox
6.
Amoeba?
7.
Amoeba
8.
Cilia
9.
Flagellum
10. Psuedopods
11. Flagella
12. Euglena
(Chloroplast)
13. Amoeba
14. Euglena
15. Paramecium
16. Paramecium
17. Amoeba
18. Volvox
I hope this is all correct!
Answer:
By the process of cellular differentiation which consists of physical and functional changes of the cell used by processes at the genetic level. The expression of these in each type of cell is different. That is to say that the type of cell follows at a time of development there is differential activation of some genes and repression of others
Answer:
C
Explanation:
During their development, many organisms look similar, suggesting that very different organisms may have a common ancestor. - Think of the human fetal neural / spine development which mirrors other species.
Answer:
yes
Explanation:
otherwise the egg will die and the period will start
