InThinking Subject Sites

Subscription websites for IB teachers & their classes

Find out more


Sitemap
Recommendations
Other subjects
Brochure

Disclaimer: InThinking subject sites are neither endorsed by nor connected with the International Baccalaureate Organisation.

Student access tools
 You need to log-in or subscribe in order to use Student access.

Ecology test - mark scheme

1. If two populations separated by a physical barrier could potentially and successfully interbreed then they are classified as2. Which of the following are maintained in an ecosystem by nutrient cycling?I NitratesII CarbonIII EnergyA I onlyB 1 and II onlyC I and III onlyD I, II and III3. Which statement best describes the role of plants and algae in an ecosystem?

To access the contents of this site, you must subscribe.