ཚན་རིགScienceKids, ages 11 to 14English

Plant cells: how they work

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Questions

1Multiple choice · 20 s · 10 ptsNot played yet
Which three parts can plant cells have that animal cells do not?
- ANucleus, cytoplasm, cell membrane
- BMitochondria, nucleus, cytoplasm
- CCell wall, chloroplasts, large vacuole
- DChloroplasts, nucleus, cell membrane
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2Multiple choice · 20 s · 10 ptsNot played yet
This is skin peeled from a layer inside an onion bulb, seen under a microscope. Why do its cells have no chloroplasts?
- AIt is hidden from light
- BThe stain washed them out
- COnions get food from the soil
- DThe cells are all dead
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3Multiple choice · 20 s · 10 ptsNot played yet
Each fluffy cotton fibre in the picture is one single, very long plant cell. What tough material is its cell wall made of?
- AStarch
- BChlorophyll
- CProtein
- DCellulose
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4Multiple choice · 20 s · 10 ptsNot played yet
In many plant cells, which part takes up most of the space?
- AThe nucleus
- BThe large vacuole
- CThe cell wall
- DThe mitochondria
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5Multiple choice · 20 s · 10 ptsNot played yet
The plant in the picture has wilted. What has happened inside its cells?
- AThey have lost water
- BThey have too much sugar
- CTheir cell walls have broken
- DThey made too much oxygen
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6True or false · 20 s · 10 ptsNot played yet
If a plant cell takes in lots of water, its cell wall stops it from bursting.
- ✓True · བདེན།
- ✕False · རྫུན།
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7True or false · 20 s · 10 ptsNot played yet
Plant cells that have chloroplasts do not need mitochondria.
- ✓True · བདེན།
- ✕False · རྫུན།
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8Multiple choice · 30 s · 10 ptsNot played yet
Watch the video of living leaf cells. Why do they need so many green chloroplasts?
- ATo store water
- BTo trap light to make food
- CTo make the leaf hard
- DTo take in minerals
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9Multiple choice · 20 s · 10 ptsNot played yet
Which leaf cells, just under the upper surface, are packed with the most chloroplasts?
- ARoot hair cells
- BGuard cells
- CXylem cells
- DPalisade cells
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10Multiple choice · 30 s · 10 ptsNot played yet
This microscope picture shows the underside of a leaf. Each tiny pore lies between two guard cells. What makes a pore open?
- AThe guard cells swell with water
- BThe guard cells shrink
- CCarbon dioxide pushes it open
- DThe leaf veins pull it open
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11Multiple choice · 20 s · 10 ptsNot played yet
Root hair cells take in water from the soil. What is this movement of water called?
- APhotosynthesis
- BTranspiration
- COsmosis
- DGermination
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12Multiple choice · 20 s · 10 ptsNot played yet
Aphids are tiny insects that suck sugary sap from plant stems and leaves. Which tubes do they feed from?
- AXylem
- BPhloem
- CStomata
- DRoot hairs
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13True or false · 20 s · 10 ptsNot played yet
The xylem tubes that carry water up a plant are made of dead cells joined end to end.
- ✓True · བདེན།
- ✕False · རྫུན།
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14Multiple choice · 20 s · 10 ptsNot played yet
Iodine solution was dropped on this cut potato and turned blue-black. Which stored food does this show?
- AProtein
- BFat
- CVitamin C
- DStarch
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15Multiple choice · 20 s · 10 ptsNot played yet
Roots grow longer as new cells are made by cell division. Where in a root does most of this cell division happen?
- ANear the tip of the root
- BWhere the root meets the stem
- CIn the root hairs
- DEvenly along the root
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16True or false · 20 s · 10 ptsNot played yet
Animal cells usually have a more regular, box-like shape than plant cells.
- ✓True · བདེན།
- ✕False · རྫུན།
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17Multiple choice · 20 s · 10 ptsNot played yet
Which of these is a plant organ?
- AA chloroplast
- BA palisade cell
- CA leaf
- DCellulose
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18True or false · 20 s · 10 ptsNot played yet
The cell wall controls which substances go into and out of a plant cell.
- ✓True · བདེན།
- ✕False · རྫུན།
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19Multiple choice · 30 s · 10 ptsNot played yet
These seedlings on a windowsill are bending towards the light. What makes their stems bend?
- ACells on the sunny side burst
- BCells on the shady side grow longer
- CThe light pulls the stems
- DCells on the sunny side grow longer
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20Multiple choice · 20 s · 10 ptsNot played yet
Most plant cells are 10 to 100 micrometres across. How many micrometres are in 1 millimetre?
- A10
- B100
- C1,000,000
- D1,000
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