You're viewing free preview questions — 4 questions previewing here — subscribe to unlock 54 more, plus the Full Question Bank, Mock Papers & Worksheets.Upgrade
Unicellular vs Multicellular Organisms — Free MYP1 Sciences Practice Questions
1QuestionFunctions Performed by One CellConcept Practice
2 marks~3 minCriterion D
Some water filters use tiny single-celled organisms to remove harmful bacteria from drinking water instead of adding chemicals.
a
State one advantage of using single-celled organisms instead of chemicals to clean drinking water. [1]
b
Describe one limitation of using single-celled organisms to clean drinking water. [1]
Solutions
2QuestionAdvantages and Limitations of UnicellularityConcept Practice
2 marks~3 minCriterion A
The diagram shows two cells: an amoeba (a single-celled organism) and a human nerve cell. Both cells have several parts labelled.
a
Name one labelled part shown in the diagram. [1]
b
Identify the labelled part that is found in both the amoeba and the nerve cell. [1]
Solutions
3QuestionComparing with Multicellular OrganismsConcept Practice
3 marks~5 minCriterion B
The table below shows the number of different cell types found in four organisms.
Organism — Number of cell types
Organism — Number of cell types
| Amoeba | 1 |
|---|---|
| Hydra | 5 |
| Earthworm | 20 |
| Human | 200+ |
a
Identify which organism has the most cell types. [1]
b
Describe the pattern you can see in the data, going from amoeba to human. [1]
c
Describe how the number of cell types is different between the amoeba and the human, and what this tells us about how complex each organism is. [1]
Solutions
4QuestionExamples of Bacteria Amoeba and ParameciumConcept Practice
5 marks~8 minCriterion C
The table below shows information about four tiny living things, each made of just one cell.
Organism — Number of cells — How it gets food — How it moves
Organism — Number of cells — How it gets food — How it moves
| Bacteria | 1 | Absorbs | Flagella |
|---|---|---|---|
| Amoeba | 1 | Engulfs | Pseudopods |
| Paramecium | 1 | Sweeps in | Cilia |
| Organism X | 1 | Engulfs | Pseudopods |
a
Identify which organism (bacteria, amoeba, or paramecium) is most similar to organism X. [1]
b
Describe one way organism X is different from paramecium. [1]
c
Compare organism X with bacteria. State one way they are similar and one way they are different. [3]
Solutions
That's every free question here — 4 of 58.
+54 more questions, plus Mock Papers & Worksheets, are waiting in Premium.