Featured Quizzes
User Quizzes
Create Quiz
Data and Charts
Badges and Games
About JetPunk
JetPunk Shop
Dark Mode
PEA life MULTIPLE CHOICE
Rate:
Last updated: May 29, 2023
You have not attempted this quiz yet.
More quiz info >>
| First submitted | May 29, 2023 |
| Times taken | 36 |
| Average score | 68.0% | Report this quiz | Report |
60:00
The quiz is paused. You have remaining.
Scoring
You scored / = %
This beats or equals
% of test takers
also scored 100%
The average score is
Your high score is
Your fastest time is
Keep scrolling down for answers and more stats ...
1.
Approx how many species of land plants have been described?
250,000
✓
400,000
✓
100,000
✓
2.
the first plants are believed to be the?
lycophytes
✓
glaucophytes
✓
liverworts
✓
3.
which of these characters emerged earliest in the evolution of plants?
true roots
✓
seeds
✓
stomata
✓
4.
which of the following gasses is NOT a major contributor to the greenhouse effect?
methane
✓
carbon monoxide
✓
ground level ozone
✓
5.
which of the following are not bryophytes?
stoneworts
✓
liverworts
✓
hornworts
✓
6.
aspirin is derived from the bark of which tree?
yew
✓
willow
✓
beech
✓
7.
which of the following nutrients is not mined or non renewable?
phosphate
✓
potassium
✓
nitrate
✓
8.
which of the following is usually considered to be a micronutrient?
manganese
✓
potassium
✓
phosphorus
✓
9.
which of the following species has the highest requirement for nitrates?
stinging nettle
✓
heather
✓
white clover
✓
10.
which part of a tomato contains chlorogenic acid, ruin and other chemicals that may reduce larval growth?
unripe fruit
✓
trichomes
✓
roots
✓
11.
in general, soil phosphate has the highest availability in which soils?
acidic
✓
neutral
✓
calcareous
✓
12.
in legumes the first site of root infection by rhizobium is the?
root cap
✓
root cortex
✓
root hair
✓
13.
which of the following is exuded by cluster roots of the proteaceae in order to solubilise rock phosphate?
calcium
✓
ammonia
✓
citrate
✓
14.
in the leaves of aquatic plants, stomata are generally found on the?
both
✓
upper surface
✓
lower surface
✓
15.
which of the following is a feature of the submerged leaves of amphibious plants?
thick cuticle
✓
high stomatal density
✓
a Carbon Concentrating Mechanism (CCM)
✓
16.
which of the following genera has sticky surface traps?
heliamphora
✓
utricularia
✓
drosera
✓
17.
most of Britain was covered by glacial ice until approx?
6000 yrs ago
✓
18000 yrs ago
✓
12000 yrs ago
✓
18.
boreal vegetation is typically composed of?
deciduous trees
✓
coniferous trees
✓
dwarf shrubs
✓
19.
cup shaped parabolic reflecting flowers are characteristic of which environment?
rainforest
✓
arctic tundra
✓
hot desert
✓
20.
sinigrin is a toxic defence chemical characteristically found in?
clovers
✓
conifers
✓
crucifers
✓
21.
in the tropical rainforest epiphytism is an adaption to?
variable water supply
✓
light limitation
✓
low nutrient status
✓
22.
which process is not associated with photosynthesis?
CO2 fixed
✓
carbohydrate oxidised
✓
O2 release
✓
23.
chloroplasts and mitochondria are thought to have been derived from bacteria via which process?
parallel evolution
✓
parasitism
✓
endosymbiosis
✓
24.
water usually comprises how much of the fresh weight of fully turgid non woody plant tissues?
40%
✓
5%
✓
90%
✓
25.
which carbohydrate is synthesised in chloroplasts and other plastids and not in the cytosol?
fructose
✓
glucose
✓
starch
✓
26.
which of the following is more likely to require light for germination?
impossible to predict
✓
a large seed eg bean
✓
a small seed eg lettuce
✓
27.
during what is known as the midday depression of photosynthesis in C3 plants stomata close to prevent?
leaf warming
✓
photorespiration
✓
water stress
✓
28.
the vapour pressure of water inside the leaf is equivalent to what relative humidity?
50%
✓
100%
✓
75%
✓
29.
a typical stomata aperture, measured as a width of the stomatal pore (in micrometers) would be?
10-15
✓
0.1
✓
50-100
✓
30.
how much of the water taken up into plant tissues is retained?
5%
✓
50%
✓
90%
✓
31.
a rainforest canopy has a high species diversity of mammals, birds and invertebrates mainly because of?
a complex canopy structure
✓
high annual temps
✓
high annual humidity
✓
32.
a corridor linking remnant forest patches is generally thought to be useful for?
conserving biodiversity
✓
ease of logging activity
✓
maintaining tree productivity
✓
33.
the planting of coniferous forests can acidify soils which in turn can lead to?
clear catchment lake water due to precipitation of humid substances
✓
dissolution of nutrient phosphorus
✓
immobilisation of metallic elements
✓
34.
in general, which of the following plant groups exhibit the highest stomatal conductances?
evergreen conifers
✓
wild grasses
✓
herbaceous crop plants
✓
35.
evapotranspiration is important to plant survival because?
disseminates the products of photosynthesis around the plant
✓
makes leaves reflective
✓
keeps the leaves cool
✓
36.
what proportion of dry matter does plant nitrogen make up?
1%
✓
2-4%
✓
10-20%
✓
37.
which of these is a key advantage of heliotropism in an arctic plant?
allows seeds to develop in the short summer
✓
avoids overheating
✓
prolongs photosynthesis for several weeks
✓
38.
leaves of plants with 'Krantz anatomy' perform which type of photosynthesis?
C3
✓
CAM
✓
C4
✓
39.
the current conc of CO2 in the atmosphere in ppm is?
390
✓
480
✓
330
✓
40.
which of the following environmental conditions tends to result in stomatal closure?
high light intensity
✓
low humidity
✓
low CO2 concentration
✓
41.
which of these crops tends to be more sensitive to ozone pollution?
wheat
✓
oilseed rape
✓
lettuce
✓
42.
which aspect of plant cell physiology tends to decrease in response to air pollution?
protein repair and turnover
✓
rubisco content and activity
✓
flavonoid biosynthesis
✓
43.
plants tend to show a greater stimulation in growth in response to elevated CO2 when?
soil N content level is high
✓
atmospheric O3 conc is high
✓
soil N content is low
✓
44.
what mechanism accounts for accelerated leaf dehydration when plants are concurrently exposed to drought and atmospheric ozone?
ozone renders stomata insensitive to ABA
✓
ozone supresses the synthesis of ABA
✓
ozone accelerates the accumulation of ABA
✓
45.
a high leaf boundary layer conductance tends to?
decrease stomatal conductance
✓
decrease evapotranspiration
✓
increase stomatal conductance
✓
46.
which of the following is not a major function of calcium?
constituent of cytoskeleton
✓
constituent of chlorophyll
✓
second messenger
✓
47.
which of the following elements may specifically become toxic to plants in anaerobic mineral soils?
calcium
✓
iron
✓
magnesium
✓
48.
in spring the growth of woodland plants such as red campion is predominately limited by?
water
✓
light
✓
nutrients
✓
49.
at which of the following stages of development are plants most vulnerable to abiotic stresses?
seedling
✓
juvenile
✓
reproductive
✓
50.
which of the following plant chemicals may inhibit digestion of proteins by herbivores?
cyanide
✓
alkaloids
✓
tannins
✓
51.
afforestation can have a very powerful drying effect in catchment soils due to?
movement of water from soil to atmosphere by evapotranspiration
✓
rainfall interception and evaporation within the canopy
✓
excessive water uptake and storage by tree species
✓
52.
stomata open at night in CAM plants in response to what internal signal?
decreasing CO2
✓
decreasing temp
✓
increasing CO2
✓
53.
the enzyme that fixes N in the root nodules of legumes?
nitrate reductase
✓
nitrogenase
✓
glutamine synthase
✓
54.
C4 plants are most typical of which of the following habitats?
desert
✓
temperate
✓
tropical
✓
55.
which of the following is NOT generally a means of drought avoidance?
deep roots
✓
perennial life cycle
✓
annual life cycle
✓
56.
pyrethroids in chrysanthemums act as effective?
pheromones
✓
insecticides
✓
herbicides
✓
57.
carnivory is an example of?
convergent evolution
✓
parallel evolution
✓
divergent evolution
✓
58.
which of the following grassland biomes is only found in southern latitudes?
prairie
✓
steppe
✓
pampas
✓
59.
which of the following traits is most likely to be found in desert plants?
large leaves
✓
ephemeral (short lived) flowers
✓
carnivory
✓
60.
the carboxylation processes in C4 plants are?
external to the chloroplasts
✓
spatially separated
✓
temporally separated
✓
61.
climatic consequences of change of land use from rainforest to pasture or grassland can potentially?
reduce evapotranspiration; increase surface temp; increase albedo
✓
increase evapotranspiration; decrease surface temp; decrease albedo
✓
reduce evapotranspiration; reduce surface temp; increase albedo
✓
62.
a common function of ethylene is to?
delay senescence
✓
promote seed germination
✓
prime rubisco
✓
63.
phenology is the study of?
leaf morphology
✓
timing of biological events
✓
root growth
✓
64.
the ACi curve is a graph indicating?
intercellular CO2 conc vs net respiration
✓
intercellular CO2 conc vs net photosynthesis
✓
net photosynthesis vs net respiration
✓
65.
which term is used to describe plants such as Hay-rattle (rhinanthus minor) which can complete their life cycle independent of a host plant?
obligate parasite
✓
holoparasite
✓
facultative parasite
✓
66.
free floating plants such as duckweed are usually restricted to water that is?
oligotrophic
✓
eutrophic
✓
hypertrophic
✓
67.
ethnobotany utilises three major groups of plant compounds which are?
glycosides, alkaloids, terpenes
✓
glycosides, terpenes, auxins
✓
triglycerides, terpenes, alkanes
✓
68.
in plant nutrition, beneficial elects are regarded as those that?
are required for the plant to complete the vegetative state of its lifecycle
✓
assist the plant in growth but prevent it from completing its lifecycle
✓
assist the plant in growth but are not necessary for the plant to complete its lifecycle
✓
69.
wheat plants that suffer from S-deficiency produce flour that is?
reduced in vitamin C
✓
reduced in glutathione
✓
reduced in vitamin B12
✓
70.
magnesium is an essential component of?
carbonic anhydrase
✓
chlorophyll
✓
urease
✓
71.
the two important micronutrients involved in the N fixing ability of root nodule bacteria are?
cobalt and molybdenum
✓
zinc and iron
✓
nickel and manganese
✓
72.
photorespiration takes place in the following plant cell components?
cytoplasm, chloroplast, ribosome
✓
chloroplasts, mitochondrion and peroxisome
✓
nucleus, mitochondrion, vacuole
✓
73.
C3 plants assimilate CO2 at a higher rate at elevated temperature because?
in C4 plants rubisco operates at saturated CO2 levels causing them to be less dependent on ambient CO2 concentrations
✓
in C4 plants increase rates of photorespiration negatively affect photosynthesis
✓
C3 plants have higher assimilation rate due to increased temp caused by elevated CO2 levels
✓
74.
in many important food crops, elevated CO2 levels can change above ground tissue quality by?
increasing starch content and decreasing N and protein content
✓
decreasing starch content and decreasing N and protein content
✓
increasing N allocation to roots
✓
75.
the range of invasive parasitic crop weed Striga hermenthica (purple witchweed) is predicted to increase in the subtropics as a result of environmental change because?
elevated CO2 concs will disadvantage the host plants
✓
larger areas of the subtropics will experience temps above the minimum germinate and growth temp of the plant
✓
changing rainfall patterns encourage germination in dormant seeds
✓
76.
a mutualistic interaction is one where?
both organisms involved are harmed by the association
✓
one organism benefits but the other is unaffected
✓
both organisms involved benefit from the association
✓
77.
the change of plant cover from one type of community to another type is called?
dispersion
✓
succession
✓
progression
✓
78.
the principal cause of secondary succession is?
the action of lichens and mosses
✓
disturbance such as a forest fire
✓
new seeds are transported into a grassland
✓
79.
maintaining the genetic diversity of agricultural crops is important in order to?
reduce pesticide damage
✓
prevent disease epidemics
✓
obtain the highest yields that are possible
✓
80.
cacti and euphorbias are found in deserts and look very similar yet are completely unrelated this is an example of?
coevolution
✓
convergent evolution
✓
adaptive radiation
✓
81.
secondary metabolites function in plants by?
making plants unpalatable for herbivores
✓
conferring stress tolerance to plants
✓
increasing photosynthetic rate
✓
82.
which best describes energy in an ecosystem?
energy in an ecosystem comes from solar energy and enters the trophic pyramid through the producers
✓
biomassss of each trophic level is about 90% of that below
✓
energy is recycled back into the lowest trophic levels
✓
83.
a tree interrupts solar energy in a forest canopy restricting access to this resource for the plants that grow on the forest floor. this is an example of?
resource competition
✓
interference competition
✓
limiting factors
✓
84.
wood consists of accumulated?
primary xylem
✓
secondary phloem
✓
secondary xylem
✓
85.
tree species gown under elevated CO2 concentrations can protect themselves from predation from invertebrates by?
increasing % leaf water
✓
producing more leaf tannins
✓
producing less biomass
✓
86.
which of the elemental cycles of carbon, phosphorus, sulphur and potassium do not have an atmospheric component?
potassium and sulphur
✓
potassium and phosphorus
✓
carbon and phosphorus
✓
87.
which of the following is least effective in photosynthesis?
blue light
✓
red light
✓
green light
✓
88.
under drought stress plants shut down their vital functions in the following order?
photosynthesis , stomatal opening, respiration, growth
✓
leaf growth, stomatal opening, photosynthesis, respiration
✓
respiration, photosynthesis, stomatal opening, leaf growth
✓
89.
in primary succession, plant colonisation passes through stages called 'seres' until stabilisation- this point is known as the?
end point succession
✓
climax succession
✓
plagioclimax succession
✓
90.
C3 and C4 plants are so called because?
they are the third and 4th type of plant physiologies discovered
✓
the number represents the number of C atoms present In the first carbohydrate photosynthetic product
✓
the numbers represent the efficiency rate of inorganic/organic conversion
✓
91.
the boundary between adjacent biomes is called an ecotone. these are important for plant biodiversity because?
they can prevent one biome from encroaching on another
✓
they may contain species that are not present in the adjacent biomes
✓
they act as a barrier to protect the biodiversity in a biome
✓
92.
a north-south transect across the Sahel in Africa, demonstrates a biome shift from tropical rainforest through Savannah to hot desert, this is primarily a result of?
overgrazing and land use due to population pressure
✓
a combination of temp change and strong prevailing winds
✓
a dramatic reduction in precipitation fro south to north
✓
93.
the 2 major factors that control the distribution of plants are?
temp and soil type
✓
precipitation and soil type
✓
temp and precipitation
✓
94.
globally, what percentage of terrestrial plants are C4 plants?
50%
✓
20%
✓
5%
✓
95.
what statement bets describes an aspect of heathland?
heathland needs to be managed to prevent succession to woodland and/or invasion by bracken and grassland
✓
heathland is a natural habitat and needs to be protected from invasive species
✓
heathland soils are generally alkaline and nutrient rich and plant growth is slow
✓
96.
multiple cropping oats or barley with vetch or peas as a mixed forage crop are advantageous because?
the yield of each of the 2 crops can be higher than if they were grown individually
✓
the legume enriches the protein of the feed and the cereal supplies the bulk of the carbohydrates and supports the weak stemmed legume
✓
the 2 crops do not compete for light, water or mineral nutrients
✓
97.
what is the best definition of an ecotype?
specific types of plants and animals that live together
✓
individuals adapted to a specific community
✓
specific types of plants and individuals
✓
98.
the plant species richness of a hay meadow tends to be lower when available N is abundant because?
many plant species will not grow when N conc are higher in soil
✓
excess N disrupts the mycorrhizal association between the plant species and the fungal species
✓
excess N favours competitive species which then dominate and less competitive plants do not thrive
✓
99.
a mycorrhizal association is beneficial to both fungal and plant partner because?
the plant provides P and fungus provides carbohydrate
✓
the plant provides carbohydrate and the fungus provides moisture and stability
✓
the plant provides carbohydrate and the fungus provides P
✓
100.
the 3 crops with the highest global production are?
cane sugar, wheat, sorghum
✓
wheat, potato, cassava
✓
cane sugar, maize, rice
✓
Comments
No comments yet
New and Popular
Save Your Progress
Copyright H Brothers Inc, 2008–2024
Contact Us | Go To Top | View Mobile Site