What is meant by the term organelle?
Reveal answer
A specialised structure inside a cell that performs a particular function.
Key words: organelle
2(a) LEVEL OF ORGANISATION · RECALL
2.1 Levels of organisation
16 recall questions. Answer from memory, reveal the answer, then rate yourself. Ratings stay on this device.
Ratings are saved in this browser on this device, under a KS4 key kept separate from International A Level recall. Written answers are temporary and cleared when you leave the page. Use Reset to clear the ratings on this device.
What is meant by the term cell?
Reveal answer
The basic structural and functional unit of life.
Key words: cell
What is meant by the term tissue?
Reveal answer
A group of similar specialised cells working together for a function.
Key words: tissue
What is meant by the term organ?
Reveal answer
A structure made from different tissues working together.
Key words: organ
What is meant by the term organ system?
Reveal answer
A group of organs cooperating in a major body function.
Key words: organ system
What is meant by the term organism?
Reveal answer
An individual living thing.
Key words: organism
Following two organisation pathways: for Organelle, give the animal example and the plant example.
Reveal answer
Animal example: Mitochondrion in a cardiac muscle cell. Plant example: Chloroplast in a palisade cell.
Key words: Organelle
Following two organisation pathways: for Cell, give the animal example and the plant example.
Reveal answer
Animal example: Cardiac muscle cell. Plant example: Palisade mesophyll cell.
Key words: Cell
Following two organisation pathways: for Tissue, give the animal example and the plant example.
Reveal answer
Animal example: Cardiac muscle tissue. Plant example: Palisade mesophyll tissue.
Key words: Tissue
Following two organisation pathways: for Organ, give the animal example and the plant example.
Reveal answer
Animal example: Heart. Plant example: Leaf.
Key words: Organ
Following two organisation pathways: for Organ system, give the animal example and the plant example.
Reveal answer
Animal example: Circulatory system. Plant example: Shoot system.
Key words: Organ system
Following two organisation pathways: for Organism, give the animal example and the plant example.
Reveal answer
Animal example: Human. Plant example: Whole flowering plant.
Key words: Organism
True or false, and why? “An organ is made from one type of tissue.”
Reveal answer
False. An organ combines several tissues; their cooperation produces the organ’s function.
True or false, and why? “Every organism has organs and organ systems.”
Reveal answer
False. Unicellular organisms consist of one cell and do not have tissues or organs.
True or false, and why? “A chloroplast is a cell.”
Reveal answer
False. A chloroplast is an organelle inside some plant and protoctist cells.
True or false, and why? “Organisation is only about increasing size.”
Reveal answer
False. Each level also brings coordinated interactions and new functions.