Which of the following is not a characteristic of overcrowding in plant and animal communities?
Population outstripping available space
Population exceeding available food
Competition within the population
increase in primary production
population increasing at the same rate as the bith rate
Correct answer is D
No explanation has been provided for this answer.
A climax community is characterised by
a stable composition of plant and animal species
rapid changes in the composition of species
constant changes in appearance of the habitat
different species occurring at different times
gradual change in animal population
Correct answer is A
No explanation has been provided for this answer.
Which of the following is not an adaptation of plants or animals to a desert environment?
Well developed tap root system
small leaves with thick epidermis
Stems with spike-like leaves
Metabolic waste in the form of uric acid in some animals
Broad leaves for storage
Correct answer is E
No explanation has been provided for this answer.
In which of the following processes is carbondioxide not given out?
respiration in plants
decay of organisms
burning organic matter
burning fuels
during photosynthesis
Correct answer is E
No explanation has been provided for this answer.
Which of the following explains the term pyramid of numbers?
the number of organisms in a trophic level
the relationship between plants in different trophic levels
the number of saprophytes and parasites in a habitat
the number of predators in a habitat
progressive decrease in the number of individuals from lower to higher trophic level
Correct answer is E
No explanation has been provided for this answer.