Multiple Choice QuestionsWhich one of the following statements is correct for secondary succession?
It occurs on a deforested site
It follows primary succession
It is similar to primary succession except that it has a relatively fast pace
It is similar to primary succession except that it has a relatively fast pace
Which one of the following statements for pyramid of energy is incorrect, whereas the remaining three are correct?
It shows energy content of different trophic level organisms
It is inverted in shape
It is upright in shape
It is upright in shape
Of the total incident solar radiation, the proportion of PAR is
about 60%
less than 50%
more than 80%
more than 80%
Which one of the following animals may occupy more than one trophic levels in the same ecosystem at the same time?
Sparrow
Lion
Goat
Goat
Both, hydrarch and xerarch successions lead to
medium water conditions
xeric conditions
highly dry conditions
highly dry conditions
The breakdown of detritus into smaller particles by earthworm is a process called
humification
fragmentation
mineralisation
mineralisation
Study the four statements (1-4) given below and select the two correct one out of them.
1. A lion eating a deer and a sparrow feeding on grain are ecologically similar in being consumers
2.Predator starfish pisaster helps in maintaining species diversity of some invertebrates
3.Predators ultimately lead to the extinction of prey species
4.Production of chemicals such as nicotine, strychnine by the plants are metabolic disorders
The two correct statements are
(2) and (3)
(3) and (4)
(1) and (4)
(1) and (4)
D.
(1) and (4)
Both lion (carnivore) and sparrow (herbivore) and consumers. The Asteroidea occupy several important roles throughout ecology and biology. Sea stars, such as Ochre star (Pisaster ochraceous) have become widely known as the example of the keystone species concept in ecology. Most species are generalist predators, eating molluscs such as clams, oysters, etc.
The biomass available for consumption by the herbivores the decomposers is called
net primary productivity
secondary productivity
standing crop
standing crop
An imporved variety of trasgenic basmati rice
does not require chemical fertilisers and growth hormones
gives high yield nd is rich in vitamin-A
is completely resistant to all insect pests and diseases of paddy
is completely resistant to all insect pests and diseases of paddy
Which domestic sewage mixes with river water
small animals like rats will die after drinking river water
the increased microbial activity releases micronutrients such as iron
the increased microbial activity uses up dissolved oxygen
the increased microbial activity uses up dissolved oxygen
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