Mammals
1. What are the typical
features of mammals?
2. What are the three main
groups into which mammals
are divided?
3. Do all mammals have a
placenta?
4. What are the main orders of
placental mammals? What are
some representative species
and distinguishing features of
each of those orders?
5. How is gas exchange done
in mammals?
6. How is circulation
characterized in mammals?
7. What isthe type of nitrogen
waste that mammals
eliminate?
8. How do placental mammals
reproduce?
9. Is fecundation in mammals
internal or external?
10. Is the mammalian
embryonic development direct
or indirect?
11. Are there aquatic and
flying mammals?
12. Are the limbs modified
into wings of bats and the
wings of birds examples of
evolutionary analogy or
homology? What about whale
fins compared to fish fins?
13. Mammal identitycard.
How are mammals
characterized according to
examples of representing
beings, basic morphology,
skin, respiration, circulation,
nitrogen waste, thermal
control and types of
reproduction?