6.4 & 6.5 questions

• Biologie
• Middelbare school
• havo, vwo
• Leerjaar 2,3

Ecologie

Bs.4 Pyramids

Bs. 5 Populations

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quiz questions: revision

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quiz questions: learnt

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Wat are reducers?

1. Animals
2. Humans
3. Plants
4. Bacteria/fungi

Which food chain is written correctly?

1. 1
2. 2
3. 3
4. 4

Which can be at the end of a food chain?

1. plants
2. animal
3. Grass
4. aphid

Do scavengers belong to the producers, consumers or decomposers?

1. producenten
2. consumenten
3. reducenten

Photosynthesis

vrespiration

glucose

Energy rich compounds in plants

energy rich compounds  in bacteria and fungi

eEnergy rich compounds in animals

respiration

respiration

Lets's discuss pyramids and populatios

6.4 and 6.5

Which is the pyramid of biomass?

a

b

1. a
2. b

Pyramid of numbers

Pyramid of biomass

In een pyramid of biomass increases the biomass at every next level.

1. correct
2. incorrect

a pyramid of numbers has always the shape of a pyramid

1. correct
2. incorrect

This is a pyramid of ...

1. numbers
2. biomass
3. it is not a pyramid
4. it can be both a pyramid of numbers and of biomass

What does the pyramid of biomass show?

1. The biomass of one animal
2. The biomass in a link in the food chain
3. The number of organisms in a link in the food chain

What type of pyramid does the picture show?

1. Pyramid of numbers
2. Pyramid of biomass
3. You can't tell

Explain why the world food problem would be solved if everyone would become a vegetarian

What is a population?

1. An organism
2. a group of organisms of the same species, who reproduce together
3. All organisms in an area
4. All biotic and abiotic factors in an area

Why is accumulation dangerous?

1. because animals eat more than they can digest
2. because plants can't do any photosynthesis
3. because in the top of a food pyramid chemicals built up to lethal levels
4. it causes an increase of biomass at each level of the food pyramid

Why is mass lost at every lev

1. if the population size is always the same
2. if the population size een bigger than usual
3. When the population size fluctuates around a a certain size
4. if the animals in a population all have the same weight

Give 2 or more ways that causes the loss of biomass when moving up in the food chain

the producers are not growing very well this year in a certain area.
Which statement is true?

1. All populations in the next links decrease
2. The populations of herbivores decrease, others do not
3. Population herbivores decreases, population carnivores increases
4. The biological equilibrium stays stabel