Match the definition with the answer the best fits. Each answer should be used o

Question

Match the definition with the answer the best fits. Each answer should be used only once. Example of an invasive species Pesticide which bio accumulates up through the food chain, its highest concentrations top carnivores A way to increase water supply which can lead to conflicts/wars between states or countries The biggest impact of cultural eutrophication Feature which makes a species prone to extinction One of the most effective approaches to protect species from going extinct The main cause of death to sea mammals and birds who die from oil spill Term that refers to the loss of water from the leaves of plants Term that describes a source of groundwater readily available for use by humans

Explanation / Answer

1. Invasive species - zebra mussels (As explained below)

Ever since their first appearance in the 80s the zebra mussels have spread rapidly and are now almost omnipresent in all states of America.

2. Pesticide which bioaccumulates - DDT (As explained below)

DDT sprayed on crops as insecticide enters the food chain and biomagnifies significantly by the time it reaches the top of the food chain.

3. A way to increase water supply that causes conflicts - watershed transfer (As explained below)

Watershed transfer includes diversion of water from area of water surplus to areas of water shortage. This causes conflicts one major reason for which is that the inhabitants at the source have to face reduction in water quota.

4. The biggest impact of cultural eutrophication - loss of dissolved oxygen (As explained below)

Cultural eutrophication causes oxygen depletion (hypoxia) in water and leads to more dead fish.

5. Feature which makes species prone to extinction - low reproductive rate (As explained below)

Decrease in reproductive rates will at the extreme encourage tendency for inbreeding. Apart from exhibiting less variation this will directly impact the survival rates and thus lead to extinction.

6. Most effective approach towards extinction - setting aside land for wildlife (As explained below) refuges.

Animals do not breed well in captivity. They need to be set in the open in their natural habitat where they cannot be preyed and disturbed. Several such programs have shown improvements in near extinct populations.

7. Main cause of death due to oil spill - oil poisoning (As explained below)

Animals try to clean themselves up and in the process, ingest the oil. That causes oil poisoning.

8. Loss of water from the leaves - transpiration (As explained below)

By definition transpiration is the loss of water from the leaves of plants.

9. Term describing source of ground water - aquifer (As explained below)

By definition of the word aquifer.

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