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Study of plant population density by quadrat method
Study of plant population density by quadrat method
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1)
What is plant population density?
Total number of species in a sampling quadrat.
A sample plot of a specific size used for the study of population.
The number of individuals of the species in any unit area at a given time.
The degree of uniformity of the occurrence of individuals of a species within a plant community.
2)
Which is correct to calculate plant population density?
Density=(Total number of sampling units employed for the study)/(Total no.of individuals of the species in all the sampling unit)
Density=(Total no.of individuals of the species in all the sampling unit)/(Total number of sampling units employed for the study)*100
Density=(Total no.of individuals of the species in all the sampling unit )/(Total number of sampling units studied )
Density=(Total number of sampling units employed for the study)/(Number of sampling units in which the species occurs)*100
3)
An ecologist divided a plot into 8 quadrats and studied the density of a particular species. He found that the total number of species occurring in all the sampling units was 58. According to his measurements, what was the density of the specific species?
8
8.25
7.25
6.4
4)
Why is the quadrat method used for calculating plant population density for extensive habitats?
Counting all individuals in a population is not possible for extensive habitats.
Quadrat method has no rules for counting plants.
Low cost.
It is possible to count all the individuals in a population using quadrat method.
5)
What is the definition for population?
A population is a group of individuals of the same species which inhabits a particular space at a particular time.
A population is a group of individuals of different species which inhabit a particular space at a particular time.
A population is a group of all the species present in a community.
A population is a group of individuals having different characteristics.
6)
Which among the following statements is not true as related to population?
A community consists of many populations of different species living in the same location at the same time.
The number of individuals in a population never remains constant.
Number of individuals may increase or decrease due to many factors like birth rate, death rate and migration.
The number of individuals in a population remains constant.
7)
The quadrat method is used to sample __________.
Sessile organisms.
Fish.
Mobile organisms.
Birds.
