What is a population?

All the organisms of one species living in the same area at the same time

In the food chain grass to rabbit to fox, what does an arrow represent?

The direction energy flows, from food to feeder

Convert nitrogen gas into nitrogen compounds plants can use

To avoid bias so the sample represents the whole area

When conditions change steadily across the habitat (a gradient)

The variety of different species in a habitat

Decomposer bacteria use up the dissolved oxygen

To show the level of pollution by their presence or absence

It removes trees that absorb carbon dioxide and burning the wood releases more

15questions. Pick an answer and you'll see why right away.

What is a population?
In the food chain grass to rabbit to fox, what does an arrow represent?
Which organisms break down dead matter and recycle nutrients?
Roughly what percentage of energy is typically transferred between trophic levels?
A producer stores 8000 kJ and the primary consumer gains 800 kJ. What percentage is transferred?
Which process removes carbon dioxide from the air?
What do nitrogen-fixing bacteria do?
Which bacteria return nitrogen gas to the air?
Why are quadrats placed randomly when sampling a field?
When is a transect used instead of random quadrats?
What does biodiversity mean?
In eutrophication, why do fish die?
Which air pollutant is the main cause of acid rain?
How can indicator species be used?
Why is deforestation a double problem for carbon dioxide?