Practice Option C - Ecology and conservation with authentic IB Biology exam questions for both SL and HL students. This question bank mirrors Paper 1A, 1B, 2 structure, covering key topics like cell biology, genetics, and ecology. Get instant solutions, detailed explanations, and build exam confidence with questions in the style of IB examiners.
Paper
Level
Question 1
HLPaper 1A
The diagram shows the carbon flux in gigatonnes per year between some of the Earth's global reservoirs.
What can be deduced from the information in the diagram?
Question 2
HLPaper 1A
In 1789 Gilbert White, a naturalist, observed eight breeding pairs of swifts (Apus apus) in the English village of Selborne. On average, each pair of swifts produces two offspring per year. This would allow the population to rise to 1030 swifts over 200 years. A bird survey carried out in 1983 revealed only 12 breeding pairs in this village.
What could have prevented the numbers rising to 1030?
I. The number of nesting sites remained the same.
II. The food supply of the swifts remained constant.
III. Predatory birds in the area were exterminated.
Question 3
SLPaper 1A
In a rock pool a student observes four different species of animal. She sees 43 flat periwinkles (Littorina littoralis), ten rough periwinkles (Littorina saxatilis), three shore crabs (Carcinus maenas) and one common goby (Pomatoschistus microps).
How many populations and communities did she see in the pool?
| Populations | Communities | |
|---|---|---|
| A. | 1 | 4 |
| B. | 2 | 3 |
| C. | 3 | 2 |
| D. | 4 | 1 |