Year 9 Science – Cells and Classification 1
Practise explaining cause and effect in cells, matching cell structure to function, calculating magnification and real size, and using keys and survey data. 20 questions. 25 minutes.
A student watches one cell divide into two cells under a microscope. Which part of cell theory does this observation support?
Which conclusion is best supported by these scientific names?
| Common name | Scientific name |
|---|---|
| Lion | Panthera leo |
| Tiger | Panthera tigris |
| Domestic cat | Felis catus |
Palisade cells are packed just below the upper surface of a leaf. Why is it useful for each palisade cell to contain many chloroplasts?
Circle 2 words in the sentence below.
A platypus eats yabbies and later passes waste out of its body. Click the two characteristics of living things this shows.
growthnutritionreproductionexcretionsensitivity
A drug stops the mitochondria in a person's muscle cells from working. What is the most direct result for those cells?
An Aboriginal community knows that when a certain wattle flowers, fish are running in the river. On which basis is this plant being classified?
Choose the word that completes each blank.
Yeast cells have a cell wall like plant cells, but they cannot photosynthesise because they have no 1. Yeast belong to the kingdom 2.
Blank 1: chloroplasts · mitochondria · nucleus
Blank 2: Plantae · Monera · Fungi
A leaf is classified as an organ. Which evidence best supports this?
Circle 2 words in the sentence below.
Click the two items in this list that are larger than a tissue in the levels of organisation.
cellorganorganelleorganismmitochondrion
Choose the word that completes each blank.
Guard cells change shape to open and close the 1 on a leaf, while xylem cells form hollow tubes that carry 2 up the plant.
Blank 1: veins · stomata · roots
Blank 2: glucose · water · oxygen
A potted plant is kept in complete darkness for a week. Which process can still happen in its cells?
Choose the word that completes each blank.
If the chloroplasts in a leaf cell stop working, the cell can no longer make 1, but it can still release energy using its 2.
Blank 1: glucose · carbon dioxide · energy
Blank 2: vacuole · nucleus · mitochondria
Circle 2 words in the sentence below.
A cell has a cell wall and a nucleus but no chloroplasts. Click the two kingdoms it could belong to.
AnimaliaPlantaeFungiMonera
Choose the word that completes each blank.
Two organisms in the same order are certain to share the same 1, but not necessarily the same 2.
Blank 1: family · genus · class
Blank 2: family · kingdom · phylum
Use the key. A student finds an animal with an internal skeleton, covered in dry scales, with no feathers. Which animal is it?
| Step | Feature | Result |
|---|---|---|
| 1a | Has a backbone | Go to 2 |
| 1b | No backbone | Go to 4 |
| 2a | Has feathers | Kookaburra |
| 2b | No feathers | Go to 3 |
| 3a | Has fur | Wombat |
| 3b | Has dry scales | Goanna |
| 4a | Has a shell | Snail |
| 4b | No shell | Earthworm |
Which cell is most likely to be a bacterium?
| Cell | Cell wall | Chloroplasts | Nucleus |
|---|---|---|---|
| P | Yes | No | Yes |
| Q | No | No | Yes |
| R | Yes | Yes | Yes |
| S | Yes | No | No |
Choose the word that completes each blank.
Oxygen enters a respiring cell by diffusion because its concentration is 1 outside the cell than inside. The waste gas that diffuses out is 2.
Blank 1: lower · higher · equal
Blank 2: oxygen · glucose · carbon dioxide
Choose the number that completes the sentence.
A cell drawn 80 mm long at a magnification of ×200 has a real length of 1 mm.
Blank 1: 0.4 · 16 000 · 2.5
A student views a cell with a ×10 eyepiece lens and a ×40 objective lens. The image of the cell measures 6 mm across. What is the cell's actual width?
How many times greater is the mean snail count in the shaded area than in the sunny area?
| Area | Quadrat 1 | Quadrat 2 | Quadrat 3 |
|---|---|---|---|
| Sunny | 2 | 3 | 1 |
| Shaded | 9 | 11 | 10 |