Spore and seed plants, animal evolution
Answers are for parents and teachers.
1
Which class has five-toed limbs, lungs and a three-chambered heart?
Amphibians.
2
The Paleozoic Era began about 539 million years ago and ended 252 million years ago. How many million years did it last?
287
3
Heart chambers in fish 2, frog 3, lizard 3 and bird 4. What is the total?
12
4
Which animals have bilateral symmetry? Write two.
Flatworms and annelids (also fish).
5
What advantage does warm-bloodedness give animals?
They stay active when outside temperature changes and can live in cold regions.