A
21.They have mammary gland to feed their young
22. They have moist akin and can live on land and in
23. They have dry scaly skin 24. They have beak and wings used in flying.
25. They have gills and fins and they live in water 26. It supports the body/framework of the body
27. It contracts heart.
28. It provides food the body
29. It supplies oxygen to the blood and removes
to carbon dioxide
30. It regulates body temperature and acts as
receptor for touch
B
fish
b. birds
c. reptiles
d. mammals
c. amphibians respiratory system
g. digestive system
h. integumentary system i. muscular system
i.skeletal sytem
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Answer:
21. d
22. c
23. b
25. a
26. skeletal system
27. circulatory system/muscular system
28. g
29. respiratory system
30. h
Explanation:
Correct me if i'm wrong:))