dars
lab
free school lessons
Lessons
My cabinet
Badges
About
Grade 7
1
2
3
4
5
6
7
8
soon
9
soon
10
soon
11
soon
🌐
EN
UZ
O‘zbekcha
EN
English
RU
Русский
Log in
Algebra
Geometry
Uzbek language
Literature
English
Russian language
Computing
History of Uzbekistan
World history
Physics
Biology (Zoology)
Geography
Technology
Advertisement
728×90 · 320×100
Chapter I
General information about animals
1
Zoology. The animal body and classification
Lessons 1–2
Chapter II
Unicellular animals (protozoa)
2
Classes Sarcodina and Flagellates
Lessons 3–4
3
Ciliates, sporozoans and Lab 1
Lessons 5–6
Chapter III
Coelenterates
4
Phylum Coelenterates
Lessons 7–8
Chapter IV
Flatworms and roundworms
5
Phylum Flatworms
Lessons 9–10
6
Roundworms and parasitic worms
Lessons 11–12
Chapter V
Annelids
7
Annelids and Lab 2
Lessons 13–15
Chapter VI
Molluscs
8
Phylum Molluscs
Lessons 16–17
Chapter VII
Arthropods
9
Class Crustaceans
Lessons 18–19
10
Class Arachnids
Lessons 20–21
11
Insects: the rose chafer and Lab 3
Lessons 22–24
12
Insect development and incomplete metamorphosis
Lessons 25–26
13
Lepidoptera and Hymenoptera
Lessons 27–28
14
Diptera and the importance of insects
Lessons 29–30
Chapter VIII
Chordates
15
The lancelet, fish external structure and Lab 4
Lessons 31–33
16
Fish internal structure and nervous system
Lessons 34–35
17
Fish reproduction and cartilaginous fishes
Lessons 36–37
18
Bony fishes and the marsh frog’s external structure
Lessons 38–39
19
Marsh frog internal structure and amphibian reproduction
Lessons 40–41
20
The agile lizard and the scaly order
Lessons 42–43
21
Turtles, crocodiles and the external structure of birds
Lessons 44–45
22
The dove’s skeleton, muscles and the plumage lab
Lessons 46–47
23
The internal structure and reproduction of birds
Lessons 48–49
24
Seasonal life of birds, oasis and desert birds
Lessons 50–51
25
Water, shore and predatory birds
Lessons 52–53
26
Poultry and mammals: structure of the dog
Lessons 54–55
27
The dog’s internal structure and mammal reproduction
Lessons 56–57
28
Mammal diversity: monotremes, marsupials, bats and rodents
Lessons 58–59
29
Carnivores and marine mammals
Lessons 60–61
30
Ungulates, primates and livestock
Lessons 62–64
☰ Contents · Biology (Zoology)
Grade 7
›
Biology (Zoology)
›
Week 23
The internal structure and reproduction of birds
Lessons 48–49 · 2 lessons · O. Mavlonov. Biology (Zoology), Grade 7. Revised and expanded fourth edition. “O‘zbekiston milliy ensiklopediyasi” State Scientific Publishing House, Tashkent, 2017
Lesson 48
Lesson 49
Quiz
8
Homework
5
Turn on JavaScript in your browser to take the quiz.
← Previous
Week 23 · Lesson 49: Reproduction, development and origin of birds
Next →
Week 23 · Homework
Advertisement
300×250 · 728×90