The new initiatives appear to be working. Unemployment continues to fall, and the number of people in work continues to increase. Independent evidence from NIESR shows that the net impact of New Deal is that unemployment is lower and employment is higher, and because of the impact of welfare spending and tax receipts, the New Deal has been close to self financing in its first two years.

11. How is extracorporeal digestion in arachnids linked to predation?

12. Which organs or respiratory adaptations aquatic and terrestrial arthropods respectively present?

13. In arthropods, why doesn't gas exchange take place via cutaneous diffusion?

14. What type of circulatory system is present in arthropods? Do these animals have a heart and respiratory pigments?

15. What are respiratory pigments? What respiratory pigment is present in some arthropods? What is its equivalent molecule in humans?

16. How is the respiratory system of insects (with its separation of circulation and respiration) related to the agility of some species of this class of arthropods?

17. What are the components of the excretory system of the three main classes of arthropods?

18. What are the noteworthy features of the nervous system of arthropods?

19. What are compound eyes?

20. How can arthropod reproduction be described?