The first volume of the seventh grade, biological methods, large field of vision unit 2, the structural level of organisms Chapter 1, cells are the basic units of life activities Section 3, answers to animal cells (PEP 20 14)

Preview before class:

1. Sterilize toothpicks with clean water and normal saline? Interior wall coating

2. Cell membrane cytoplasm nucleus

Classroom research 1:

B

Classroom research 2:

B

Classroom training:

1.b？ 2.d？ 3.A

4.( 1)③ ? Sterilize toothpicks, physiological saline, dilute iodine solution, etc.

(2)50? (3) Mirror

(4) Draw many vacuoles, and the nuclei are represented by dense fine dots.

After-school promotion:

c？ 2.A 3。 d？ 4.d？ 5.C 6。 d？ 7.D 5。 Answer? 9.c？ 10.c？ 1 1.c？ 12.C

13.( 1) B？ (2)⑤? Vacuole (3) Sertoli cells? (4)③? chloroplast

14.( 1)B？ Answer? (2)⑤? ②? (3) Cell wall? Chloroplast 8? Vacuole (4) Cell wall and cell membrane (5) Vacuole (6) Chloroplast

-Hunan teaching model