Characteristics and classifications of living organisms Flashcards
MRS GREN
Movement, Respiration, Sensitivity, Growth, Reproduction, Excretion, Nutrition
Metabolism
Chemical reactions that happen within an organism
Excretion
Removal of metabolic waste
Egestion
Food which has passed through the gut without being digested
Gametes
sex cell
Variation
Not identical to parents
Respiration word equation
glucose + oxygen —-> carbon dioxide + water + energy
Respiration symbol equation
C6H12O6 + 6O2 —-> 6CO2 + 6H2O
Respiration
Release of energy form food, not breathing
Classification system
Kingdom, Phylum, Class, Order, Family, Genus, Species / Trivial
Pentadactyl limb
humerus, radius + ulna and 5 digits
What do all cells have?
Cell membrane, cytoplasm, DNA and ribosomes
What do bacteria contain?
Cell wall, cell membrane, plasmid, ribosomes, a loop of DNA flagella (single flagellum) and cytoplasm. NO mitochondria!
What are the five kingdoms?
Plant, animal, prokaryotes, protoctists, fungi
What are saprotophs?
Fungi that feed on dead / decaying matter
What are plasmids?
Additional loops of DNA inside cytoplasm
What organisms are classified as protoctists
Uni and multicellular organisms eg. protozoans and algea
Name a single celled fungi
Yeast
What is the cell wall of fungi made of?
Chitin
Can fungi carry out photosynthesis?
No
What is the main body of a fungus called?
Mycelium, consisting of a branching network of hyphae
What do hyphae do?
Grow over surface of food source, releasing enzymes
Are viruses cells and what are they made of?
No, they are particles made of DNA / RNA
Do prokaryotes have nuclei?
No
