Practise MYP Biology questions on 8.4 Pollution and Conservation and review the explanations to check your understanding.
Use these questions for topic practice and to find ideas you want to revisit in your notes or lessons.
In the process of eutrophication, what is the specific biological role of decomposers in the formation of a 'dead zone'?
Which of the following is a direct effect of acid rain on the physical structure of terrestrial plants?
Microplastics are particularly dangerous because they can absorb toxic chemicals and release substances that __________ in organisms.
Why does the decline of soil organisms like worms and microbes due to pollution reduce ecosystem productivity?
Why does the use of pesticides often lead to a reduction in the overall productivity of a land ecosystem, even if the target pest is eliminated?
They prevent light from reaching the bottom of the lake
They utilize large amounts of dissolved oxygen while breaking down dead algae
They act as a primary food source for fish and invertebrates
They release excess nitrates and phosphates into the water
It damages leaf tissues, which significantly reduces the rate of photosynthesis
It stimulates the production of more flowers to increase reproductive success
It encourages roots to grow longer to reach more alkaline soil layers
It increases the stability of the stem to prevent wind damage
speed up growth
disrupt hormones
increase respiration
block digestion
It causes the overproduction of methane by soil bacteria
It prevents plants from absorbing shortwave radiation
It increases the pH of the soil, making it too alkaline for roots
It slows down the essential processes of decomposition and nutrient cycling
Pesticides often harm non-target organisms like soil microbes and pollinators, disrupting nutrient cycles and reproduction
Pesticides increase the rate of photosynthesis, causing plants to exhaust their nutrients
Pesticides prevent the Earth from emitting longwave radiation
Pesticides cause the soil to become too alkaline for native vegetation
