A2 Biology (OCR) Unit 2 Module 3 Quiz

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Created by: Hannah
Created on: 12-06-11 18:13

A(n) _______ is the place where an organism lives.

ecosystem

1 of 15

The level at which an organism feeds in a food chain is called a ________ level

trophic

2 of 15

Creating a pyramid of energy involves....

burning the organisms in a calorimeter

3 of 15

What is primary productivity?

the amount of energy fixed by photosynthesis

4 of 15

What are mosses and lichens known as when they are the first organisms to colonise bare rock?

pioneer community

5 of 15

In the UK, provided there are no grazing animals, what is the climax community?

forest

6 of 15

What is used to measure percentage cover when studying ecosystems?

quadrat

7 of 15

When nitrates flow into rivers and streams, it is known as..

Leaching

8 of 15

About ___% of nitrogen fixation is done by the Haber process and lightning strikes.

10%

9 of 15

Saprotrophs are..

organisms that feed by secreting enzymes onto dead material

10 of 15

Denitrification occurs in:

waterlogged soil (anaerobically)

11 of 15

The maximum population size that can be maintained over a period of time in a particular habitat is called..

carrying capacity

12 of 15

Coppicing is where trees are cut __ ______ _______ of the trunk to encouraging growth

at the base

13 of 15

When populations of deer are high, trees are __________ to ensure the deer don't eat the shoots as they grow back.

pollarded

14 of 15

Where do Rhizobium bacteria live?

root nodules of plants

15 of 15

Other cards in this set

Card 2

Front

The level at which an organism feeds in a food chain is called a ________ level

Back

trophic

Card 3

Front

Creating a pyramid of energy involves....

Back

Card 4

Front

What is primary productivity?

Back

Card 5

Front

What are mosses and lichens known as when they are the first organisms to colonise bare rock?

Back

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A2 Biology (OCR) Unit 2 Module 3 Quiz