Lesson 6.1

• Biologie
• Middelbare school
• vwo
• Leerjaar 4

What is the name for the trapping of heat by gases in the atmosphere.

1. gas shield
2. global warming
3. carbon footprint
4. greenhouse effect

Largest number of individuals of a population that the environment can support

1. carrying capacity
2. primary succession
3. limiting factor
4. density dependent factor

When fertilizers run off farmland into streams and ponds, the nitrogen content of the water increases. This can lead to rapid growth of algae in a process called eutrophication. How can this process affect other organisms in the water?

1. Oxygen is used up as algae is decomposed, reducing the amount available to other organisms.
2. The water becomes better able to support aerobic organisms.
3. The algae provide food for fishes and other organisms, leading to decreased algae populations.
4. The extra nitrogen provides additional food for the other organisms, increasing their population.

Put the steps in order

1

2

3

4

5

6

In eutrophication, what does 'algal bloom' refer to?

1. The rapid increase in the number of bacteria
2. The rapid increase in the number of plants
3. The rapid decrease in the number of fish
4. The rapid increase in the amount of nitrates in the river

In eutrophication, what directly causes the death of fish?

1. The plants use up oxygen in respiration
2. The fish are poisoned by high CO2 levels
3. Bacteria use up oxygen in respiration
4. The fish use up oxygen in respiration

Which level in the pyramid has the most energy?

1. 1 because they are autotrophs
2. 1 because they are carnivores
3. 4 because they are autotrophs
4. 4 because they are carnivores

What is bioaccumulation or biomagnification?

1. buildup of toxins in an organism
2. the total mass/amount of organisms in a given area
3. the number of different species in an area

Which organism would have the most bioaccumulation?

1. A because it consumes all the toxins from B, C, and D
2. D because energy is lost as heat
3. A because I'm not really reading what this says.
4. D because it consumes all the toxins from B, C, and D