Name two types of chromatin.

Name two types of electric current?

Name the two types of primary productivity.

Name two types of maps generated by HGP.

Name the two types of raw materials used in the process of photosynthesis?

Name the type of circulation in flatworms.

Answer the following questions: What is an aritifical satellite?Name any two types of artifical satellite and state their functions.

Name the two types of solids.

Name the two types of nutrient cycles.

Name the two types of nitrogen fixers.

Name the two types of living organisms in which chloroplasts are found?