1. Care sunt tipurile de radacini? 2. Unde se gaseste scufia la o radacina si ce rol are?

3. Notati 3 functii ale radacinii.

4. Din ce este alcatuita seva bruta?

5. Din ce este alcatuita seva elaborata?

6. Prin ce tip de vase conducatoare circula seva bruta?

7. Prin ce tip de vase conducatoare circula seva elaborata?

8. Notati 3 plante cu tulpini subterane.

9. Notati 3 tipuri de muguri.

10. Mentionati 3 functii ale tulpinii.

All ova contain sex chromosomes corresponding to: x y xx xy

Sequence how oxygen accumulated in the atmosphere and the effect it had on life by completing the flowchart

Astudy by solloch and et. al., in 2017, gives the map above which shows the frequency of alleles with a ccr5-delta32 mutations over 87 different countries. this mutation deletes the presence of a co-receptor (ccr5) on the outside of human t-cells (lymphocytes). some viruses, such as the one responsible for the black death and human immunodeficiency virus (hiv), require this receptor for attachment to host cells during the infection process. the black death was an epidemic that passed over northern europe during the 14th century killing nearly 60% of europeans. according to this information, which explanation best explains why northern europeans show a greater immunity for hiv than some other parts of the world?