Winter vacation homework questions for seventh grade, winter vacation homework questions for the fir

5. Plants include herbaceous plants and woody plants.

6. The characteristics of herbaceous plants are (xylem is less developed to underdeveloped) 7. The characteristics of woody plants are (xylem is developed).

8. Animals include (vertebrates) and (invertebrates.

9. Vertebrates include (mammals), (birds), (reptiles), (amphibians), (fish).

10. The characteristics of mammals are (there is hair on the surface of the body, which is generally divided into five parts: head, neck, trunk, limbs and tail; breathe with your lungs; has a constant body temperature and is a homeothermic animal; The brain is large and well developed; Suckle; Viviparous. Mammalism and viviparity are the most distinctive features of mammals. ）

11. The characteristics of reptiles are ().

12. Amphibians are characterized by ().

13. The characteristics of birds are ().

14. The characteristics of fish are ().

15. The characteristics of insects are ().

16. The characteristics of bacteria are ().

17. The characteristics of the virus are ().

18. The characteristics of fungi are ().

19. The condition for food mold is ().

20. If water resources, forest resources, biological resources, and atmospheric resources are destroyed, what disasters will this bring to mankind?

Look it up in the textbook yourself, right? It's not difficult! Good luck with your studies!

5。Herbaceous and woody plants.

6. The stems are relatively loose and soft.

7. The stem is relatively tight and hard.

8. Vertebrates and invertebrates.

9. Mammals, reptiles, amphibians, birds, fish.

We have no history of = =.

5.Naked seeds and quilts.

Qinglian Jushi - Li Bai Liuquan Jushi - Pu Songling Xiangshan Jushi - Bai Juyi Yi'an Jushi - Li Qingzhao Liuyi Jushi - Ouyang Xiu.

Qinglian monk - Li Bai (great poet of the Tang Dynasty);

Liuquan Monk - Pu Songling (Qing scholar);

Xiangshan monk - Bai Juyi (great poet of the Tang Dynasty);

Yi'an Jushi - Li Qingzhao (Southern Song Dynasty female lyricist);

61 Layman - Ouyang Xiu (Northern Song Dynasty writer);

I. 36. 10,000 digits.

4.5. Hundreds.

5.-2a 2, (a+b)*(10a+b)two, b, b, a, c, a

The above answers are for reference, but you still need to complete the homework independently.

No, kid, doing it yourself is the king.