Heterotrophs and Autotrophs Flashcards

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1
Q

What are autrophs?

A
  • They are organisms that are capable of synthesising their own complex organic food molecules from simpler inorganic ones
  • they are self -feeding and organisms in this group make use of an external, non-living supply of energy to drive their self-feeding way of life/
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2
Q

What are photoautrophs?

A

This captures the sun’s energy and use it to convert simple inorganic molecules such as carbon dioxide and water, into complex, energy-rich organic food

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3
Q

what are chemoautrophs?

A

They obtains the energy they need for food manufacture by oxidising inorganic molecules such as ammonia and hydrogen sulphide.
- they do not use light

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4
Q

what are species of chemoautrophs known as?

A

Known as Nitrifying bacteria
- plays an essential part in the nitrogen cycle
- nitrifying bacteria oxidises ammonium and nitrate ions

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5
Q

what happens to energy releases by the oxidation reactions?

A

It is used by the bacteria to manufacture their own food

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6
Q

what happens to the nitrates absorbed by green plants?

A
  • Nitrogen is incorporated by green plants and nitrogen is incorporated into nitrogen-containing organic compounds
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7
Q

What are primary producers?

A

organisms can produce their own food through photosynthesis

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8
Q

what type of molecules do aututrophs synthesise?

A

lipids, proteins, nucleic acids and vitamins

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9
Q

what does auto mean?

A

self

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10
Q

what does troph mean?

A

nutrition

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11
Q

what does hetero mean?

A

another

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12
Q

what does troph mean?

A

nutrition

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13
Q

what are heterotrophs?

A

These organisms cannot make their own food. They ingest and digest complex organic molecules releasing the chemical potential energy stored in them.
- these molecules then can be converted into molecules such as glycogen, lipids, proteins and nucleic acids

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14
Q

examples of heterophs?

A
  • animals
  • fungi
  • some bacteria
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15
Q

Do autotrophs respire?

A

yes

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16
Q

Can autotrophs synthesise complex organic molecules from simple inorganic molecules?

A

yes

17
Q

do autotrophs use light energy?

A

photoautotrophs - yes
chemoautotrophs - no

18
Q

do autotrophs hydrolyse complex organic molecules?

A

yes

19
Q

examples of autotrophs ?

A
  • plants
  • algae
  • some bacteria
20
Q

do heterotrophs respire?

A

yes

21
Q

Can heterotrophs synthesise complex organic molecules from simple inorganic molecules?

A

No

22
Q

do heterotrophs use light energy?

A

no

23
Q

do heterotrophs hydrolyse complex organic molecules?

A

yes