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PEA life TRUE/FALSE
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Last updated: May 29, 2023
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| First submitted | May 29, 2023 |
| Times taken | 79 |
| Average score | 76.0% | Report this quiz | Report |
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1.
the doubling in cereal yield that was achieved from 1960 to 2000 can be attributed solely to genetic improvement.
True
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False
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2.
the endosymbiosis of photosynthetic bacteria is believed to have given rise to the first photosynthetic eukaryotes.
True
✓
False
✓
3.
the first vascular plants appeared on land about 600 million years ago.
True
✓
False
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4.
in the tundra, annual herbs and large shrubs tend to dominate the vegetation.
True
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False
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5.
plant species richness is generally higher in cold deserts as opposed to hot deserts.
True
✓
False
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6.
water flows from regions with higher (nearer to 0) water potential to regions with lower water potential (more negative).
True
✓
False
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7.
dissolved solutes increase water potential.
True
✓
False
✓
8.
a stomatal density tends to increase in plants grown at elevated CO2 concentrations.
True
✓
False
✓
9.
the monarch butterfly sequesters cyanide from plant tissue then emits small quantities to deter predators.
True
✓
False
✓
10.
in general, annual plants avoid rather than resist, low temperature stress.
True
✓
False
✓
11.
in general plants resistant to chilling injury have a lower proportion of saturated: unsaturated fatty acids in membrane lipids compared to chill sensitive plants.
True
✓
False
✓
12.
tropical rainforest trees generally have deep roots for support and to capture nutrients that are leached downwards by the high rainfall.
True
✓
False
✓
13.
herbaceous woodland species such as bluebell tend to produce relatively large numbers of small seeds.
True
✓
False
✓
14.
if a mature, fully expanded leaf becomes shaded, the chloroplast will re-orientate to maximise light absorption.
True
✓
False
✓
15.
perennial species allocate more resources to reproduction than annual species.
True
✓
False
✓
16.
even in lakes in which the phytoplankton are limited by nutrients, the marginal reed beds may have high productivity.
True
✓
False
✓
17.
oligotrophic lakes show limited plant productivity.
True
✓
False
✓
18.
denitrification rarely occurs in anaerobic, waterlogged soils.
True
✓
False
✓
19.
stomata open because K+ ions are actively transported out of the guard cells.
True
✓
False
✓
20.
plants from wet habitats generally exhibit lower maximum stomatal conductance than those from dry habitats.
True
✓
False
✓
21.
water moves from the root to the shoot through a pipeline (the xylem) made up from dead lignified cells.
True
✓
False
✓
22.
the plant cuticle is freely permeable to both water and CO2.
True
✓
False
✓
23.
the rate of CO2 diffusion in water is considerably higher than that in the air.
True
✓
False
✓
24.
photosystems I and II are located on the chloroplast boundary membrane.
True
✓
False
✓
25.
in general, dehydrated leaves are less prone to freezing injury than fully turgid leaves.
True
✓
False
✓
26.
nitrogen fixation occurs symbiotically in root nodules of peas, beans and some woody plants.
True
✓
False
✓
27.
dormancy can only be overcome by the passage of time.
True
✓
False
✓
28.
plant cell expansion is driven by an increase in turgor.
True
✓
False
✓
29.
the passage of water from the root hairs to the xylem involves both the symplastic (within cells) and apoplastic (between cells) pathways.
True
✓
False
✓
30.
SO2 remains the dominant air pollutant affecting air pollution across Europe.
True
✓
False
✓
31.
carnivorous plants tend to be found in nutrient rich habitats.
True
✓
False
✓
32.
plants in the tundra can maximise their photosynthetic rate by reducing their low temperature optima.
True
✓
False
✓
33.
a reduction in transpiration surface helps plants adapt to arid conditions.
True
✓
False
✓
34.
high silica content can protect grasses from mammalian herbivory.
True
✓
False
✓
35.
domesticated plants were thought to have arisen in 'Vavilov centres' during 9000-1500BC.
True
✓
False
✓
36.
deforestation can potentially alter climate by changing surface albedo.
True
✓
False
✓
37.
in the middle of the 19th century most CO2 emissions could be attributed to non tropical deforestation.
True
✓
False
✓
38.
their is evidence to suggest that terpenes released from coniferous trees in warm weather act as a natural form of cloud seeding which can affect climate.
True
✓
False
✓
39.
mycorrhiza fungi can take up heavy metal ions from the soil and concentrate them in the root tissue of the host plant.
True
✓
False
✓
40.
plant chlorosis caused by mineral nutrient deficiency is always most evident on the youngest leaves.
True
✓
False
✓
41.
selenium is an essential element for plants, but not for animals.
True
✓
False
✓
42.
'Kranz' anatomy is not essential for C4 photosynthesis.
True
✓
False
✓
43.
the starch content of Panicum increases six-fold when grown under 900ppm CO2 compared with ambient CO2.
True
✓
False
✓
44.
a pioneer plant species is one that can colonise bare rock.
True
✓
False
✓
45.
carbon in forest ecosystems is concentrated above ground while in grassland ecosystems it is generally concentrated below ground.
True
✓
False
✓
46.
ecological succession is the process of plant communities replacing one another through time.
True
✓
False
✓
47.
ruderal planets such as dandelions are adapted to high disturbance, low stress habitats.
True
✓
False
✓
48.
the state of stability found at the end of a secondary succession is called a climax community.
True
✓
False
✓
49.
the impact of climate change on agricultural yield reduction is likely to impact the tropics rather than the northern hemisphere.
True
✓
False
✓
50.
as a forest ecosystem ages, the stomatal conductance and photosynthetic rate of the tree species tends to decrease.
True
✓
False
✓
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