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iGCSE Biology > Characteristics and classifications of living organisms > Flashcards

Characteristics and classifications of living organisms Flashcards

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1
Q

MRS GREN

A

Movement, Respiration, Sensitivity, Growth, Reproduction, Excretion, Nutrition

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2
Q

Metabolism

A

Chemical reactions that happen within an organism

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3
Q

Excretion

A

Removal of metabolic waste

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4
Q

Egestion

A

Food which has passed through the gut without being digested

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5
Q

Gametes

A

sex cell

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6
Q

Variation

A

Not identical to parents

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7
Q

Respiration word equation

A

glucose + oxygen —-> carbon dioxide + water + energy

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8
Q

Respiration symbol equation

A

C6H12O6 + 6O2 —-> 6CO2 + 6H2O

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9
Q

Respiration

A

Release of energy form food, not breathing

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10
Q

Classification system

A

Kingdom, Phylum, Class, Order, Family, Genus, Species / Trivial

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11
Q

Pentadactyl limb

A

humerus, radius + ulna and 5 digits

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12
Q

What do all cells have?

A

Cell membrane, cytoplasm, DNA and ribosomes

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13
Q

What do bacteria contain?

A

Cell wall, cell membrane, plasmid, ribosomes, a loop of DNA flagella (single flagellum) and cytoplasm. NO mitochondria!

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14
Q

What are the five kingdoms?

A

Plant, animal, prokaryotes, protoctists, fungi

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15
Q

What are saprotophs?

A

Fungi that feed on dead / decaying matter

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16
Q

What are plasmids?

A

Additional loops of DNA inside cytoplasm

17
Q

What organisms are classified as protoctists

A

Uni and multicellular organisms eg. protozoans and algea

18
Q

Name a single celled fungi

A

Yeast

19
Q

What is the cell wall of fungi made of?

A

Chitin

20
Q

Can fungi carry out photosynthesis?

A

No

21
Q

What is the main body of a fungus called?

A

Mycelium, consisting of a branching network of hyphae

22
Q

What do hyphae do?

A

Grow over surface of food source, releasing enzymes

23
Q

Are viruses cells and what are they made of?

A

No, they are particles made of DNA / RNA

24
Q

Do prokaryotes have nuclei?

A

No

iGCSE Biology (1 decks)

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