Which of the following best defines a heterotroph?

An organism that obtains energy by digesting the parts of other organisms

What is a biomass pyramid?

The mass of living material at a stage in a food chain.

In biology, “organic” refers to

molecules with covalent bonds between carbon and hydrogen atoms

What is an Autotroph?

An organism that makes its own food from inorganic substances.

Where does a trees mass come from?

C, O from CO2 and H from water making glucose

The net primary productivity of a tree is:

the tree’s increase in biomass per square metre, per year.

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BIO 12 Quiz - Transfer of solar energy into biomass

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Answers

1
In a biomass pyramid the tertiary consumer has the highest number
False
True
2
Which of the following best defines a heterotroph?
An organism that can manufacture its own food
An organism that obtains energy by digesting the parts of other organisms
An animal that meets its energy needs by feeding on other animals
An animal that kills and eats other organisms for food and nutrients
3
The dry mass material in an organism is called?
dry mass
biomass
wet mass
midnight mass
4
What is a biomass pyramid?
How each living thing gets food.
Energy transferred in food chains.
The mass of living material at a stage in a food chain.
Organisms that make food.
5
In biology, “organic” refers to
molecules that contain carbon
vegetables produced without fertiliser or pesticides
a substance that occurs naturally in living things
molecules with covalent bonds between carbon and hydrogen atoms
6
Approximately how much light from the sun is useable by a plant?
50%
90%
25%
10%
7
What is an Autotroph?
An organism that obtains energy by digesting the bodies of other organisms
A tertiary consumer
An organism that makes its own food from inorganic substances.
A primary consumer.
8
What percentage of the energy that enters the secondary consumer flows through to the tertiary consumer trophic level?
45%
20%
90%
10%
9
Where does a trees mass come from?
Soil
C, O from CO2 and H from water making glucose
Water
CO2
10
The net primary productivity of a tree is:
the total biomass produced by the tree, per square metre per year.
the tree’s gross primary productivity, minus its net primary productivity.
the tree’s increase in biomass per square metre, per year.
the total dry weight of the tree at the end of a year

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